单项选择题

He made a lot of ______ in his exercises.

A. faults
B. mistakes
C. defects
D. shortcomings
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单项选择题
Look, a car ______ the bridge.
A. is shooting off
B. was shooting off
C. is shooting of
D. was shooting on
单项选择题
Never ______ until tomorrow what you may be done today.
A. put forward
B. put over
C. put through
D. put off
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