Thecancerriskssmokinghavebeenw

The cancer risks ___________ smoking have been well documented.

A．involved with	B．involving with
C．associating with	D．associated with

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The watch was very good，and he ________ 20 percent down for it.

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A．check	B．allow
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A．curious about	B．allergic to
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A．accidentally	B．carelessly
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A．commercial	B．generous
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