题目内容
The book was written in 1946, ________ the education system has witnessed great changes.
[ ]
A.
when
B.
during which
C.
since then
D.
since when
答案:D
解析:
解析:
|
句意为:“这本书写于1964年,从那时起教育体制发生了巨大变化。”因为从句中时态为现在完成时,故选since when来引导这一定语从句。A、B两项引导的从句应使用过去某种时态;C项只是充当后面从句中的时间状语,而不能充当引导词,来引导该从句,故排除。 |
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