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---Why do you look so upset? ---There are so many troublesome problems . A.remai

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---Why do you look so upset? ---There are so many troublesome problems . A.remai

---Why do you look so upset?

---There are so many troublesome problems _____.

A.remaining tobe settled                   B.remainedsettled

C.remaining tosettle                      D.remained tobe settled

 

试题答案

【答案】

A

【解析】

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