题目内容

Youcan’tplug()thememorystickwhenthelightisflashing.Otherwise,thesystemdatamaybedamaged.

A. to
B. of
C. towardas
D. for

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They’retearing()theseoldhousestoputupanewofficebuilding.

A. down
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A. out
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A. honor
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A. informing
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