单项选择题

A freely tailing body has an acceleration of 32 feet a second during each second（）it falls.

A. that
B. why
C. which
D. as

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His handwriting is （）yours.

A. more better
B. as well as
C. much better than
D. as better as
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When a fire（）at the National Exhibition in London, at least ten priceless paintings were completely destroyed.

A. broke off
B. broke out
C. broke down
D. broke up
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