Weve signed an agreement and we cant______of it now.A.back downB.back offC.back upD.back o

外语类 专四 已帮助 人

Weve signed an agreement and we cant______of it now.

A.back down

B.back off

C.back up

D.back out

请帮忙给出正确答案和分析,谢谢!

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