Therelifeontheearthforhundreds

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There ___ life on the earth for hundreds of millions of years.
A. has been B. is having C. have been

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Smoking is bad for your health. You should.

A．give up it

B．give up them

C．give it up

D．give them up

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Aron water five days later.

A．ran out

B．used out

C．ran out of

D．used out of

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He lives_______ in the______ village, but he is never_______.

A．alone; alone; lonely	B．alone; lonely; lonely;
C．lonely; alone; lonely	D．lonely; lonely; alone.

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Pollution is a serious problem. Scientists have _____ some good ways to save it.

A．come up with

B．come on

C．come out

D．come up

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We can’t put off _____ a plan .

A．make

B．to make

C．making

D．to making

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