单选题It was _____ it raised many difficult questions that the book took a long time to come out.A sinceB becauseC afterD when
题目
单选题
It was _____ it raised many difficult questions that the book took a long time to come out.
A
since
B
because
C
after
D
when
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参考答案和解析
正确答案：
B
解析：
此题考查强调结构，强调的是原因状语。故选B。
此题考查强调结构，强调的是原因状语。故选B。