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【单选题】
Scientists study ___________ human brains work to make computer.
A.
when
B.
how
C.
that
D.
whether
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】By the time the tornado ended, more than 700 people _________.
A.
have killed
B.
had been killed
C.
were killed
D.
had killed
【单选题】The water behind the Three Gorges Dams (三峡大坝) should be ______ higher than downstream（下游）。
A.
sixty-five meter
B.
sixty-fifth meter
C.
sixty-five meters
D.
sixty-fifth meters
【单选题】Her work is often very hard and she gets very tired．The work is _____.
A.
wonderful
B.
splendid
C.
tedious
D.
magnificent
【单选题】Look at the picture．The painter, I think, is the most ______ artist in the country.Look at the picture. The painter, I think, is the most ______ artist in the country.
A.
creative
B.
powerful
C.
effective
D.
responsible
【单选题】Some small chemical plants in Industrial Park will be closed down within half a year according to a decision _______ yesterday.[ ]
A.
making
B.
made
C.
to be made
D.
to make
【单选题】Large quantities of information，as well as some timely help ________since the organization was built.
A.
has offered
B.
had been offered
C.
have been offered
D.
is offered
【单选题】I 'm afraid that idea will not work ____when carried out.[ ]
A.
in theory
B.
in practice
C.
in public
D.
in private
【单选题】I was ________ by the salesman whose products turned out to be much less effective.
A.
taken up
B.
taken in
C.
taken down
D.
taken out