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 works.()

A. Since the beginning
B. have become
C. in
D. the way how

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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 not
B. matters of no important
C. vital
D. deal with
单项选择题
He has died for years, so almost nobody knows him.()

A. has died
B. for years
C. so
D. almost nobody
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