单项选择题
(Since the beginning) of this century, more and more scientists (have become) interested (in) (the way how) the human brain
A.Since the beginning
B.have become
C.in
D.the way how
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单项选择题
(Now that) he is working (much harder), I don't think he'll (have any trouble)(to pass) the entrance exams.
A.Now that
B.much harder
C.have any trouble
D.to pass
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单项选择题
(Let's) not waste time on (matters of no important). We have other (vital) problems to (deal with).
A.Let's
B.matters of no important
C.vital
D.deal with
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