I’ve thrown away my old trousers I’ll have to buy .A. a new pairB. a new oneC. some newD.

问题补充：

I’ve thrown away my old trousers, I’ll have to buy .

A. a new pair

B. a new one

C. some new

D. some new pair

答案：

(答案→)A. a new pair

B. a new one

C. some new

D. some new pair

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