单项选择题

You ought________ the matter to the manager the day before yesterday.

A．to report
B．to have reported
C．to reporting
D．have reported
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单项选择题
The doctor will not perform the operation_________ it is absolutely necessary.
A．so
B．if
C．for
D．unless
单项选择题
The question_________ at the meeting tomorrow is very important.
A．to discuss
B．being discussed
C．to be discussed
D．will be discussed
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