[答案]B
39.(2011·黑龙江哈九上学期期末)There's no light on in the dormitory. They must have gone to attend the concert to be held on the campus, ________?
A. didn't they
B. mustn't they
C. haven't they
D. shouldn't they
[解析]本题考查反意疑问句。当 must 表示推测时,其反意疑问句结构一般也不用 mustn't,而须用助动词(即通常用的 do,be 或 have)的否定式,而且还要根据具体情况来分析究竟是对过去还是对现在进行的推测。如:You must have seen him yesterday,didn't you?根据句子中过去的时间状语 yesterday 可知,此句属于对过去的推测,真实结构应该是 You saw him yesterday。所以使用 didn't you 构成反意疑问句。You must be a writer,aren't you?由于句子中没有具体的表示过去的时间状语,这是对现在的推测,真实结构应该是 You are a writer,所以使用 aren't you 构成反意疑问句。She must have come earlier,hasn't she?由于句子没有具体的表示过去的时间状语,但是含有 have come 结构,故此真实结构应该是 She has come earlier,所以使用 hasn't she 构成反意疑问句。
[答案]C
40.(2011·皖南八校第一次联考)Make full use of your time ________ you can achieve what you desire.
A. so
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