题目内容

Professor Zhang,_______ for his informative speech, is warmly received by his students.

A. knowing
B. known
C. to be known
D. having known

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She got to know Sam while______ the new P&T products release conference.

A. attending
B. to attend
C. attend
D. attended

_____ in the queue for an hour, she suddenly realized that she had left her passport at home

A. To wait
B. have waited
C. Having waited
D. To have waited

To put everything in order,Mary put away her_________ in the upstairs room.

A. summer'sclothes
B. summer clothes
C. summers'clothes
D. summer cloth

Hardly________ when a loud explosion was heard

A. the train had started
B. the train had been started
C. had the train strated
D. did the train start

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