【題目】The number of lung cancer will go down greatly if people 　　　　to give up smoking and do more regular exercise.

A. persuade B. will persuade

C. be persuaded D. are persuaded

【答案】D

【解析】考查時態(tài)。句意：如果人們被勸服戒煙和做更多的運動，肺癌的數(shù)量會大幅下降。如果主句用一般將來時，條件狀語從句中通常用一般現(xiàn)在時代替將來時；另外，人們是被勸服的，因此應該用被動語態(tài)。故選D。

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