单项选择题

(Hard) (as) he worked, (but) Mr. Brown couldn't (keep) the shop properly.

A．Hard
B．as
C．but
D．keep
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单项选择题
If he (gives) a chance to (enroll) in your university, I'm sure he (will prove) his (worth).
A．gives
B．enroll
C．will prove
D．worth
单项选择题
When we walked (past) the theater, there were a lot of people (waited) (in) a long line outside the (box office).
A．past
B．waited
C．in
D．box office
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