单项选择题

39（）

A．speakers
B．listening
C．conversation
D．occasions

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单项选择题

There is no point ______ to persuade him to have one more try.

A．to try
B．of trying
C．in trying
D．if you try

单项选择题

We have been told that under no circumstances ______ the telephone in the office for personal affairs.

A．may we use
B．we may use
C．we could use
D．did we use

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