题目内容

I feel my health _____.

A. improve
B. to be improving
C. to be improve
D. to have improved

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They are not aware of the reasons _____ people are unwilling to discus insurance.

A. when
B. where
C. why
D. how

John is strongly convinced that extra time spent studying now will _____ in the future.

A. show off
B. set off
C. pay off
D. take off

It is typical of students to stay up _____ deep into the night for the final exam.

A. to read
B. having read
C. to have read
D. reading

只能用于单一目标研究的老七种工具是( )11-277

A. 因果图
B. 分层图
C. 调查法
D. 直方图

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