题目内容

______several times,they need encouragement.

A. Being failed
B. Having failed
C. To fail
D. To be failed

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After______in the street for two hours, the driver became furious.

A. having held up
B. having been held up
C. held up
D. being held up

Agriculture is the country's chief source of wealth,wheat______by far thebiggest cereal crop.(2003.TEM-4)

A. is
B. been
C. be
D. being

Upon being questioned,he denied______the article.

A. writing
B. to write
C. having written
D. to be written

That young man still denies______the fire behind the store.(2001.1.CET-4)

A. start
B. to start
C. having started
D. to have started

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