单项选择题

He operates the new machine as if he ______ special training in it.

A. has received
B. had received
C. would receive
D. received
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单项选择题
He had hardly finished the article ______ the light went out.
A. as
B. until
C. than
D. when
单项选择题
He advised Jane ______ anyone about the shortages of food.
A. not telling
B. not tell
C. tell not
D. not to tell
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