填空题
Great changes
have
taken place
since
I
had visited
the city.
A. have
B. taken place
C. since
D. had visited
【正确答案】
【答案解析】
D 应改为visited。[解析] 主句谓语为现在完成时，由since引导的时间状语从句只能用一般过去时，故D应改为visited。本句的意思是：“这座城市自从我游览过后发生了巨大的变化。”
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