单项选择题

"______are the Olympic Games held "They______once every four years."

A. How soon; occur

B. How long; are held
C. How often; occur

D. How far; are held
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Everyone hopes that we can do something to make things better, so we can’t help______under the stress.
A. but working
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Two of the notebooks______Tom had lost on the bus were returned to the main desk at his dormitory building.
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