填空题There is much room to boost your energy while not appearing too zany.____

共用题干
The Caffeine Habit

There are more than 170 million drug addicts in the U.S.,and the strange thing is that you can be
counted as one of them.You consume your drug of choice every day;you'd feel ill if you couldri't have it;
you'd have a hard time quitting it.
_______________(46)And if you think you get it only in coffee,tea,coca cola,or in smaller bite of choco-
[ate,you haven'tbeen paying attention.Food manufacturers recognize a hot market when they see it,and
with anywhere from 55%to 90%of the U.S.population consuming caffeine every day. _______________(47)The
popular Red Bull energy drink is one of them,and others like caffeine-infused gum,mints,beer,candy,even
soap一which is supposed to provide its caffeine boost through the skin.
Regular amount of caffeine has been the subject of endless medical studies.We know caffeine could
work effectively by controlling neurotransmitters that would normally make you sleepy,improving cognitive
Function and even athletic performance.________________(48)"Exactly what level of caffeine is harmful is not
clearly established,but generally more than five cups of coffee is too much,"said physiologist Harris Lieber-
man from U.S.Army Research Institute of Environmental Medicine,who has been studying the effects of
caffeine for more than 20 years."It's typically possible to die from a caffeine overuse,but,"says Dr. Eric
Lavonas, a North Carolina emergency-room doctor,"you have to really work at it." _______________(49)Bill
Bradley,in 2000 presidential candidate,attributed his irregular heartbeat to caffeine overuse.
In a country of caffeine addicts,it's unlikely that you'll never develop a serious problem,and there
aren't any repair centers for coffee dependence._______________（50)The highest caffeine boost can be felt one
hour following input,but significant effects can last for eight hours.If you're at risk for heart disease or
digestive disorders,talk to your doctor about how much caffeine you should be drinking. Like any pleasurable
substance,caffeine can be abused.So enjoy一but with care.

_________（50）
A:Depending on the study,the stuff now is turning up everywhere.
B:The chemical that has you addicted,of course,is caffeine.
C:But how much is too much?
D:Far more common are people who simply fall ill from eating or drinking too much of that stuff.
E:Here are seven tips to loosen the death grip of caffeine addiction.
F: So the best advice is to know your limits.

That desk takes up too much space．

A:chance
B:employment
C:room
D:opportunity

共用题干
Save Energy At Home

On the average,Americans waste as much energy as two-thirds of the world's
population consumes.That's largely the_________(1)of driving inefficient cars,using
inefficient appliances（设备）,and living and working in poorly insulated（隔热）buildings.
Then what can you do to_________(2)the situation?
Buy energy-efficient products一Buy new appliances or electronics of the highest
energy-efficiency rating.New energy-efficient models may cost more initially,but have a
lower operating ___________(3)over their lifetimes.The most energy-efficient models
___________(4)the Energy Star label,which identifies products___________(5)use
20 -40 percent less energy than standard new products. According to the EPA（美国环境
保护署）,the typical American household can save about $400 per year in___________(6)bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs（荧光灯）一Change the three bulbs you use
___________(7)in your house to compact fluorescents.Each compact fluorescent bulb
will keep half a ton of CO₂ out of the air___________(8)its lifetime.___________(9),
compact fluorescent bulbs last ten times as long and can save $30 per year in electricity
costs.
Set heating and cooling temperatures correctly一Check thermostats（温度自动调节
器）in your home to make sure they are___________(10)at a level that doesn't waste
energy.
Turn off the lights一Turn off lights and other electrical appliances such as televisions
and radios when you're not___________(11)them.Install automatic timers for lights that
people in your house frequently___________(12)to turn them off when leaving a room.
Let the sun shine in一The cheapest and most energy-efficient light and heat source is
often right outside your window. On___________(13) days, open blinds（百叶窗）to let
the sun light your home for free.Also remember that___________(14)entering a room
equals passive solar heating.Even on cold winter days,sun streaming into a room can
raise the temperature by several___________(15).

_________(2)
A:improve
B:create
C:face
D:explain

共用题干
Save Energy At Home

On the average,Americans waste as much energy as two-thirds of the world's
population consumes.That's largely the_________(1)of driving inefficient cars,using
inefficient appliances（设备）,and living and working in poorly insulated（隔热）buildings.
Then what can you do to_________(2)the situation?
Buy energy-efficient products一Buy new appliances or electronics of the highest
energy-efficiency rating.New energy-efficient models may cost more initially,but have a
lower operating ___________(3)over their lifetimes.The most energy-efficient models
___________(4)the Energy Star label,which identifies products___________(5)use
20 -40 percent less energy than standard new products. According to the EPA（美国环境
保护署）,the typical American household can save about $400 per year in___________(6)bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs（荧光灯）一Change the three bulbs you use
___________(7)in your house to compact fluorescents.Each compact fluorescent bulb
will keep half a ton of CO₂ out of the air___________(8)its lifetime.___________(9),
compact fluorescent bulbs last ten times as long and can save $30 per year in electricity
costs.
Set heating and cooling temperatures correctly一Check thermostats（温度自动调节
器）in your home to make sure they are___________(10)at a level that doesn't waste
energy.
Turn off the lights一Turn off lights and other electrical appliances such as televisions
and radios when you're not___________(11)them.Install automatic timers for lights that
people in your house frequently___________(12)to turn them off when leaving a room.
Let the sun shine in一The cheapest and most energy-efficient light and heat source is
often right outside your window. On___________(13) days, open blinds（百叶窗）to let
the sun light your home for free.Also remember that___________(14)entering a room
equals passive solar heating.Even on cold winter days,sun streaming into a room can
raise the temperature by several___________(15).

_________(5)
A:where
B:while
C:that
D:since

If you are writing or studying,it makes very much difference where the light comes from.People who use books and pens every day have to be especially careful about the way the light shines on their work.
Every house gets its light either from daylight through the windows--which is the best to use--or from lamps or electricity;but whichever kind of light it is,the way it shines toward our book or work is a matter of great importance to the eyes.
Take a book,sit with your back toward the window,and try to read.Your shadow（影子）falls all over the page and makes it almost as bad for your eyes as if you were in a dark room.
Now turnaround and face the window.The page is in the shadow again,while the bright light is in your eyes.
Try sitting with your right side toward the window.This is very well for reading,but if you were writing,the shadow of your hand would fall across the page and bother（打搅）you a little.
There is just one other way:sit with your left side to the window.Now everything is perfect for reading and for writing,too.
Whatever kind of light is in the room,the rule about the right to sit is always the same.

Which of the following is true?

A.How the light shines on our work is of much importance.
B.The way the light shines on your work makes no difference.
C.We needn't care about where the light comes from.
D.People can write or study under a light that comes from any direction.

____________ your opinions are worth considering, the committee finds it unnecessary to place too much importance on them.

A.As
B.Since
C.If
D.While

共用题干
Energy Cycle
Do you find getting up in the morning so difficult that it's painful?This might be called laziness,but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
During the hours when you labor through your work you may say that you're“hot”.That's true .The time of day when you feel most energetic is when your cycle of body temperature is at its peak .For some people the peak comes during the morning. For others it comes in the afternoon or evening.No one has discovered why this is so,but it leads to such familiar monologues as:“Get up,John!You'll be late for work again!”The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean,and which cycle each member of the family has.
You can't change your energy cycle,but you can learn to make your life fit to it better. Habit can help,Dr. Kleitman believes. Maybe you're sleepy in the evening but you must stay up late anyway .Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day,rise before your usual hour. This won't change your cycle,but you'll get up steam and work better at your low point.
Get off to a slow start which saves your energy .Get up with a leisurely yawn and stretch.Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before .Whenever possible,do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.

Which of the following statements is NOT TRUE?
A: Getting off to work with a minimum effort helps save one's energy.
B: Dr. Kleitman explains why people reach their peak at different hours of day.
C: Habit helps a person adapt to his own energy cycle.
D: Children have energy cycles,too.

共用题干
Save Energy At Home

On the average,Americans waste as much energy as two-thirds of the world's
population consumes.That's largely the_________(1)of driving inefficient cars,using
inefficient appliances（设备）,and living and working in poorly insulated（隔热）buildings.
Then what can you do to_________(2)the situation?
Buy energy-efficient products一Buy new appliances or electronics of the highest
energy-efficiency rating.New energy-efficient models may cost more initially,but have a
lower operating ___________(3)over their lifetimes.The most energy-efficient models
___________(4)the Energy Star label,which identifies products___________(5)use
20 -40 percent less energy than standard new products. According to the EPA（美国环境
保护署）,the typical American household can save about $400 per year in___________(6)bills with products that carry the Energy Star.
Switch to compact fluorescent bulbs（荧光灯）一Change the three bulbs you use
___________(7)in your house to compact fluorescents.Each compact fluorescent bulb
will keep half a ton of CO₂ out of the air___________(8)its lifetime.___________(9),
compact fluorescent bulbs last ten times as long and can save $30 per year in electricity
costs.
Set heating and cooling temperatures correctly一Check thermostats（温度自动调节
器）in your home to make sure they are___________(10)at a level that doesn't waste
energy.
Turn off the lights一Turn off lights and other electrical appliances such as televisions
and radios when you're not___________(11)them.Install automatic timers for lights that
people in your house frequently___________(12)to turn them off when leaving a room.
Let the sun shine in一The cheapest and most energy-efficient light and heat source is
often right outside your window. On___________(13) days, open blinds（百叶窗）to let
the sun light your home for free.Also remember that___________(14)entering a room
equals passive solar heating.Even on cold winter days,sun streaming into a room can
raise the temperature by several___________(15).

_________(6)
A:phone
B:water
C:food
D:energy

If you are writing or studying,it makes very much difference where the light comes from.People who use books and pens every day have to be especially careful about the way the light shines on their work.
Every house gets its light either from daylight through the windows--which is the best to use--or from lamps or electricity;but whichever kind of light it is,the way it shines toward our book or work is a matter of great importance to the eyes.
Take a book,sit with your back toward the window,and try to read.Your shadow（影子）falls all over the page and makes it almost as bad for your eyes as if you were in a dark room.
Now turnaround and face the window.The page is in the shadow again,while the bright light is in your eyes.
Try sitting with your right side toward the window.This is very well for reading,but if you were writing,the shadow of your hand would fall across the page and bother（打搅）you a little.
There is just one other way:sit with your left side to the window.Now everything is perfect for reading and for writing,too.
Whatever kind of light is in the room,the rule about the right to sit is always the same.

When you sit with your face towards the window,__________?

A.your shadow falls on your book
B.your book is in a shadow
C.the light is still dark
D.the light is on your page

If you are writing or studying,it makes very much difference where the light comes from.People who use books and pens every day have to be especially careful about the way the light shines on their work.
Every house gets its light either from daylight through the windows--which is the best to use--or from lamps or electricity;but whichever kind of light it is,the way it shines toward our book or work is a matter of great importance to the eyes.
Take a book,sit with your back toward the window,and try to read.Your shadow（影子）falls all over the page and makes it almost as bad for your eyes as if you were in a dark room.
Now turnaround and face the window.The page is in the shadow again,while the bright light is in your eyes.
Try sitting with your right side toward the window.This is very well for reading,but if you were writing,the shadow of your hand would fall across the page and bother（打搅）you a little.
There is just one other way:sit with your left side to the window.Now everything is perfect for reading and for writing,too.
Whatever kind of light is in the room,the rule about the right to sit is always the same.

The best way both for reading and for writing is to__________.

A.sit facing the light
B.let the light shine from your back
C.sit with your right side towards the light
D.have the light come from your left