Some scientists believe that there will be more robots in       years.
A．hundreds ofB．hundred of
C．two hundreds ofD．two hundreds
A

試題分析：句意為：一些科學(xué)家相信數(shù)百年后將會有更多的機(jī)器人。當(dāng)hundred/thousand/million等詞前有確切數(shù)字時，hundred/thousand/million等詞后應(yīng)不加“s”，且無of；當(dāng)hundred/thousand/million等詞前無確切數(shù)字時，hundred/thousand/million等詞后加“s”，且有of。根據(jù)語境可知應(yīng)選A。
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