单项选择题

The authority claims that the new pills can dramatically increase life expectancy, but there's no evidence to support this.

A．empirical
B．actual
C．concrete
D．imperial
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How strict tutors are with their pupils ______ a strong impact on the quality of their pupils' academic papers.
A．has
B．have
C．having
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______ , she led a life of complete seclusion, and almost isolated from the outside.
A．Being disgraced
B．Disgraced
C．Disgracing
D．She was disgraced
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