单项选择题

________ the government agrees to give extra money, the theater will have to close.

A．Lest
B．If
C．Provided
D．Unless
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How much does it cost you to ________ your large house and garden
A．keep back
B．keep down
C．keep on
D．keep up
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He said he would accept the job, so we have asked him to ________ his acceptance in writing.
A．affirm
B．inform
C．conform
D．confirm
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