单项选择题

While ______ in the UK, he visited a lot of cities of the country.

A. study
B. studying
C. studied
D. to study
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单项选择题
The TV set ______ in the repair shop right now.
A. be repaired
B. is being repaired
C. being repaired
D. repaired
单项选择题
The manager was held up by the traffic jam, otherwise he ______ here an hour earlier.
A. had arrived
B. would have arrived
C. arrived
D. would arrived
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