单项选择题

You ______ yesterday if you were really serious about the job.

A. ought to come
B. ought to be coming
C. ought to have come
D. ought have come
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单项选择题
Without the worker's help, Sam ______ so much progress.
A. would not make
B. would not have made
C. will not make
D. did not make
单项选择题
The forest guards often find campfires that have not been ______ completely.
A. turned down
B. put out
C. put away
D. turned over
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