单项选择题

The （） he said it he knew what a mistake he had made.

A．moment
B．time
C．occasion
D．hour

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单项选择题

By the time you have completed the essential training, you （） exposed to virtually every new feature of the course.

A．will have been
B．will be
C．would have been
D．would be

单项选择题

The issue （） at the conference is very important and it will create a sensation nationwide.

A．discussed
B．being discussed
C．is being discussed
D．has been discussed

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