单项选择题

（）the reactions of people with this drug, scientists have learned more about the brain.

A、 By studying
B、 To study
C、 They study
D、 They're studying

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（）her husband, her daughter also went to see the movie.

A.Exce ptfor
B.Beside
C.Except
D.Besides
单项选择题
He wasn't keen（）buying a car, but we talked him into it.

A.about
B.for
C.to
D.on
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