单项选择题

In addition, teaching staff is willing to extra help if a student needs.

A) providing
B) provide
C) provides
D) provided
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It is not urgent, so you may do it ______ your leisure.
A. at
B. in
C. by
D. with
单项选择题
The ______ earthquake left 3,000 homeless. A. violent B. extensive C. endless D. furious
The ______ earthquake left 3,000 homeless.
A. violent B. extensive C. endless D. furious
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