单项选择题

The office staff______gathered to celebrate the coming Spring Festival.

A. have
B. is being
C. has
D. is
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单项选择题
He was very much interested in the work of charities, and made a regular______to them.
A. dedication
B. fellowship
C. hospitality
D. contribution
单项选择题
If the law and order______, neither the citizen nor his property is safe.
A. is not preserved
B. are not preserved
C. were not preserved
D. have not been preserved
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