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
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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
单项选择题
It is said that he ______ murder.
A．committed
B．conducted
C．executed
D．emitted
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