【題目】The country spends ____ dollars helping the poor every year.

A.two billion ofB.two billions

C.billion ofD.billions of

【答案】D

【解析】

句意:這個(gè)國(guó)家每年花費(fèi)數(shù)十億美元幫助貧民。

考查數(shù)詞的用法。billion意為十億,數(shù)詞。billion前有具體數(shù)字時(shí),其后不加s,也不與of連用,若billion前沒(méi)有數(shù)目或數(shù)量,則用billions of,固定詞組,意為“幾十億,數(shù)十億”。故選D

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