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-They used to be good friends but now they are like strangers. -How this . [ ] A

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-They used to be good friends but now they are like strangers. -How this . [ ] A

-They used to be good friends but now they are like strangers.

-How ________ this ________.

[]

A.did; come aboutB.did; happen toC.come; /D.was; happened

试题答案

答案:A