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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Compared with the residents of other cities, residents of Shanghai have a longer life
A．range
B．scale
C．scope
D．span
单项选择题
A man who goes from door to door selling things has to be ________ if he wants to succeed.
A．abundant
B．aggressive
C．ambitious
D．arbitrary
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