【題目】Somescientiststhinkthatitmaytake_____yearstomakerobotswalk

A. hundredsofB. twohundredsofC. twohundreds D. twohundredof

【答案】A

【解析】

句意“一些科學(xué)家認(rèn)為讓機(jī)器人走路可能要花費(fèi)成百上千年”。本題考查hundred的用法。hundred與具體數(shù)字連用時(shí),hundred不加s,排除C;hundredof連用時(shí),要加s,但是數(shù)詞與of不能同時(shí)出現(xiàn),排除BD,故選A。

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