A pair of earphones (cost) ______ a little of money these days.

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问题 A pair of earphones (cost) ______ a little of money these days.

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答案costs

解析 现在要买一副耳机,花钱不多,本题考查a pair of的用法。earphones,trousers,shoes,glasses,socks,stockings,scissors单独作主语时,谓语动词用复数,但当它们与a pair of或pairs of连用时,谓语动词与pair的数保持一致。因为本句中用a pair of,所以其后的谓语动词用单数。
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