ofthewaterpolluted.Wemusttryto

_____ of the water _____ polluted. We must try to protect our environment.

A．Two third; are

B．Two third; is

C．Two thirds; are

D．Two thirds; is

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A．on; on

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B．since

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—________ I’m looking forward to meeting him.

A．Perfect!

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D．Sure!

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