单项选择题

This instrument, _____and operating next year, will consist of three telescopes.

A．completed
B．completing
C．to complete
D．to be completed
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单项选择题
Bats are long-lived creatures, _____a life-expectancy of around 20years.
A．Asome have
B．some having
C．some of them have
D．some of which having
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