[答案]D
23.(2010·上海)—Sorry, Professor Smith. I didn't finish the assignment yesterday.
—Oh, you ________ have done it as yesterday was the deadline.
A. must
B. mustn't
C. should
D. shouldn't
[解析]句意:——对不起,史密斯教授,昨天我没有完成作业。——哦,你本应该完成的,因为昨天是最后的期限。四个选项中B项不能与 have done 连用,故排除; must have done 意为“肯定做了……”,表推测,说明说话人对所推测的事情把握较大,如:It must have rained last night,for the ground is wet now.昨天夜里肯定下雨了,因为地面现在是湿的。should have done 本应该做……(实际上没做……);shouldn't have done 本不应该做……(实际上做了……)。由语境可知C项正确。
[答案]C
24.(2010·北京)—Good morning, I've got an appointment with Miss Smith in the Personnel Department.
—Ah, good morning. You ________ be Mrs Peters.
A. might
B. must
C. would
D. can
[解析]句意:——早上好,我和人事部的 Smith 小姐有约。——啊呀,早上好。那您一定是 Peters 女士。本题考查情态动词表推测的用法。根据题干可以判断说话人对所推断的情况很肯定,故选择B项。
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