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

What the correspondent sent us is an ______ news report. We can depend on it.

A. evident

B. authentic
C. ultimate

D. immediate

单项选择题

People have always been（）about exactly how life on earth began.

A.curious
B.excited
C.anxious
D.careful

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