Because of the cold weather, half of the children________ill for a week.

A.has beenB.have fallen
C.have beenD.has fallen

C

解析試題分析:句意:由于這次冷空氣的原因,一個(gè)星期,有一半的孩子已經(jīng)生病了。分析:對(duì)現(xiàn)在造成的影響是孩子們生病了,體現(xiàn)現(xiàn)在完成時(shí)的用法,構(gòu)成have/has done(動(dòng)詞的過去分詞)。主語(yǔ)是children,因此助動(dòng)詞為have.故選 C
考點(diǎn):考查動(dòng)詞時(shí)態(tài)。

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