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He was very lucky to get the treatment . [ ] A.in a half cost B.by half cost C.a

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He was very lucky to get the treatment . [ ] A.in a half cost B.by half cost C.a

He was very lucky to get the treatment _____.

[]

A.in a half costB.by half cost

C.at half the cost D.with half cost

试题答案

答案:C

解析:

at half the cost意为“以……的价钱”。