19.Some scientists believe that there will be more robots in        years.( 。
A.hundreds of B.hundred ofC.two hundreds ofD.two hundreds

分析 一些科學(xué)家相信幾百年后會(huì)有更多的機(jī)器人.

解答 正確答案:A.hundred,thousand等數(shù)詞如表示不確定數(shù)目,其常用表達(dá)是hundreds/thousands of,后跟可數(shù)名詞復(fù)數(shù).當(dāng)表達(dá)確定數(shù)目時(shí),其常用表達(dá)是基數(shù)詞+hundred/thousand,后跟可數(shù)名詞復(fù)數(shù).根據(jù)句意一些科學(xué)家相信幾百年后會(huì)有更多的機(jī)器人,此處指不確定的數(shù)目,則應(yīng)用hundreds of,故選擇A.BCD三項(xiàng)表達(dá)錯(cuò)誤,兩百應(yīng)是two hundred.

點(diǎn)評(píng) 本題考查數(shù)詞,記住hundred,thousand的基本用法,再根據(jù)題干進(jìn)行選擇.

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