The enemy retreated to the woods after they_（）
A. defeated
B. had defeated
C. are defeated
D. had been defeated
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— Has John finished writing his compostion？— No, and it ______ two hours ago（）
A. should be finished
B. should have finished
C. should finish
D. should have been finished
A tall man ______ down the road at midnight（）
A. was seen run
B. was seen running
C. saw running
D. has been seen running
The slave ______ from morning till night（）
A. made to work
B. was made working
C. was made worked
D. was made to work
_that the first cheese was probably made more than 4000 years ago by nomadic tribes in Asia（）
A. It is believed
B. It is believing
C. It believed
D. It is to believe
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