单项选择题

There are eight tips in Dr. Roger's lecture on sleep, and one of them is: ______ to bed early unless you think it is necessary.

A．doesn't go
B．not to go
C．not going
D．don't go

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单项选择题

I have worked with him for some time and have found that he is ______ than John.

A．more efficiently a worker
B．a more efficient worker
C．more an efficient worker
D．a worker more efficiently

单项选择题

We need to consider what ______ we will be using for language training.

A．abilities
B．appliances
C．facilities
D．qualities

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