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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单项选择题
One cannot be too careful, ______
A. can one
B. can he
C. can she
D. can they
单项选择题
Henry is so arrogant after being promoted president of the company _______ accept the invitation to his former coworker's wedding.
A. in order to
B. as to
C. as to not
D. as not to
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