单项选择题

Jack worked as hard as he could______up with the others.

A．as to catch
B．in order to catch
C．so that he caught
D．to be caught
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单项选择题
My computer isn't working. It______.
A．need repairing
B．needs repairing
C．need to repair
D．need to be repaired
单项选择题
You'd better ______ your computer before you use it again.
A．observe
B．begin
C．check
D．pick
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