21. _____ ten minutes earlier, you wouldn’t have missed the train. But you were late。
A. Had you come
B. Did you come
C. Have you come
D. Should you come
22. Having been told that her son died in the accident, the old woman appeared very calm, as if nothing _____。
A. happened
B. were happened
C. was happened
D. had happened
23. You should carefully think over _____ the manager said at the meeting。
A. that
B. which
C. what
D. whose
24. Last week I wrote to the hotel to book a room, but they _____ yet。
A. didn’t answer
B. wasn’t answering
C. hadn’t answered
D. haven’t answered
25. Diana felt very much upset at _____ to the party as she had longed to go for a long time。
A. having not been invited
B. not having been invited
C. not to be invite
D. to be not invited
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