On a long trip, one needs ________ to carry his clothes．A.several luggageB.several pieces of luggagesC.several pieces of luggageD.several luggages
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C解析luggage作不可数名词表示“行李”，后不可以接s作复数结构，所以B和D均不对。而选项A的several不能修饰luggage．我们用a piece of luggage来表示“一件行李”。这句句子的意思是“在长途旅行中，一个人需要几件行李来装下他的衣服。”