题目内容

Conversation calls for a willingness to alternate the role of speaker with ______ of listener, and it calls for occasional "digestive pauses" by both.

A. that
B. one
C. ones
D. those

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寒冷环境血压略有升高,高温环境下血压略有下降。()

______ enough articles, Mr. Smith was refused promotion in his academic title.

A. Not having published
B. Having not published
C. Being not published
D. Not being published

Your new product ______ so well but for a lot of advertisements we put on the television.

A. should not be sold
B. would not have sold
C. should not sell
D. had not sold

______ somewhat ambitious as well as naive, they decided to extend their graduate education by attending a prestigious university in New York City.

A. To be
B. Were
C. Being
D. Were to

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