单项选择题
(That) the woman (was saying) was so important that I asked everyone (to stop) talking and (listen).
A.That
B.was saying
C.to stop
D.listen
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单项选择题
(Thirteen hundred) medical professionals, (all of which) have been trained to treat drug dependency, (attended) the annual convention (sponsored) by a society.
A.Thirteen hundred
B.all of which
C.attended
D.sponsored
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单项选择题
To control (quality), and (making) decisions (about) production are among the many responsibilities of an (industrial) engineer.
A.quality
B.making
C.about
D.industrial
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