Teenagerstheirhealthbecausethe

Teenagers _____their health because they play computer games too much.

A．have damaged	B．are damaging
C．damaged	D．will damage

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—Did you have any difficulty catching yesterday’s lecture?
—No. The professor spoke very clearly to make his speech easy _____.

A．understood

B．understanding

C．to be understood

D．to understand

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After months of voyage, Columbus arrived in _____ later proved a new continent.

A．where

B．which

C．what

D．that

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—Do you think our team will win the game?
—I don’t know. But this is the last chance. We _____ them to.

A．hope

B．require

C．prefer

D．demand

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____ our natural resources is very necessary.

A．The most we make of	B．The most we make
C．The most which we make	D．Most which we make of

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_____ is known to us all is that the old scientist, for _____ life was hard in the past, still works very hard in his eighties.

A．As; whom

B．What; whom

C．It; whose

D．As; whose

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