单项选择题

He is badly ill. We must （）a doctor at once.

A．send to
B．send for
C．send away

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单项选择题

The hospital（）last year.

A．built
B．was built
C．has been built

单项选择题

—Shall I get one more apple for you, Dad —Thanks, but you （）. I've had enough.

A．may not
B．must not
C．needn't

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