单项选择题

If being carried out successfully, the plan will completely change the traffic conditions in the city.

A．carried
B．is carried
C．having been carried
D．to carry
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单项选择题
We have been told that under no circumstances we can use the telephone in the office for personal affairs.
A. did we use
B. may we use
C. we may use
D. we could use
单项选择题
Some children display an unacceptable curiosity about every new thing they encounter.
A．incredible
B．infectious
C．incompatible
D．inaccessible
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