______their work will give us a much better feel for the wide differences between the two schools of thoughts.(2002.6.CET-4)
A. Being reviewed
B. Having reviewed
C. Reviewing
D. To have reviewed
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It was a terrible noise_______the sudden burst of light.
A. followed
B. following
C. to be followed
D. being followed
______several times,they need encouragement.
A. Being failed
B. Having failed
C. To fail
D. To be failed
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