單項選擇題

My trousersre too old.I’ll hve to buy ____. new pirB. new oneC. pir ofD.some new pirMy trousersre too old.I’ll hve to buy ____. new pir B. new one C. pir of D.some new pir

A.a(chǎn) new pairB.a(chǎn) new oneC.a(chǎn) pair ofD.some new pair
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