单项选择题

I stayed up all night （） to find a new solution to the problem.

A．trying
B．have tried
C．try
D．tried

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单项选择题
This ATM has been out of service for a few days. It should （） last week.

A．fix
B．be fixed
C．have fixed
D．have been fixed
单项选择题
The hotel （） during the vacation was rather poorly managed.

A．as I stayed
B．where I stayed
C．which I stayed
D．what I stayed
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