单项选择题

Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.

A. having
B. had

C. have
D. to have

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单项选择题

—When will you be through with your work．Jones —______My boss usuallY finds something for me to do at the last minute．

A．Who knows
B．Would you help me
C．I beg your pardon
D．Anything the matter

单项选择题

So far nobody has claimed the money（）in the library.

A.discovered
B.to be discovered
C.discovering
D.having discovered

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