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Some scientists think that it may take ______years to make robots look like people, and do the same things as us.

A．hundreds of	B．two hundreds of
C．two hundreds	D．two hundred of

此題重點考察數量的表示方法，確切的數量德表示方法：數詞+hundred/thousand/million+名復;不確切數量的表示方法是hundreds/thousands
/millions of+名詞的復數形式。

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