单项选择题

Two hours ______ the limit of this test.

A．are
B．has been
C．have been
D．is
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单项选择题
I couldn't find ______ ,and so I took this one.
A．a large enough coat
B．a large coat enough
C．an enough large coat
D．a coat enough large
单项选择题
The children went there to watch the iron tower ______.
A．to erect
B．be erected
C．erecting
D．being erected
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