摘要:B 考查情态动词.“can’t have + 过去分词 表示对过去情况的可能性推测.此处意为“不可能已完成 .
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I can't attend the meeting because I have work to do.?
A. at;some other B. to;other some?
C. /;some other D. /;another?
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—You part in the party in time.?
—Sorry,I was delayed by the accident.?
A. are supposed to take
B. have supposed to take?
C. are supposed to have taken
D. supposed to take?
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Tom kept quiet about the accident lose his job.?
A. so not as to B. so as not to?
C. so as to not D. not so as to?
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