题目内容

Theengineer’searsarehighlysensitive()anyunusualsoundinthemachine.

A. of
B. on
C. to

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Everynewstaffisrequiredtotakethetrainingcourse,()willhelpthemknowmoreaboutthecompany.

A. which
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A. besubmitted
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Idon’tthink()possibletomasteraforeignlanguagewithoutmuchmemorywork.

A. it
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