题目内容

－I’d like to help the homeless people in the earthquake.
－You ________ join a volunteer group.
A．mustB．needC．canD．couldn’t
C

试题分析：句意：-我想去帮助地震中无家可归的人。-你可以加入志愿者团体。A must   必须B. need 需要在疑问句和否定句中做情态动词C. can能，会，可以D. couldn’t不能。根据句意故选C
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