This pair of sunglasses _____ out of fashion.I’d like to buy a new ____.B.is,pair D.is,one

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This pair of sunglasses _____ out of fashion.I’d like to buy a new ____.B.is,pair D.is,one
This pair of sunglasses _____ out of fashion.I’d like to buy a new ____.B.is,pair D.is,one

This pair of sunglasses _____ out of fashion.I’d like to buy a new ____.B.is,pair D.is,one
答案:A.
1.pair构成的名词短语做句子主语时,谓语动词的数与pair保持一致,所以谓语动词用is;
2.但是如果用代词代替该短语时,必须用复数性的代词来指代或直接用pair,而B中的one为单数代词,排除.

D