Some amazing people _______ our world for the better in the past 100 years.
A.changeB.a(chǎn)re changingC.have changedD.had changed
C

試題分析:表示過去的某一動(dòng)作或行為一直持續(xù)到現(xiàn)在,用現(xiàn)在完成時(shí),故選C。
點(diǎn)評(píng):英語中的時(shí)態(tài)主要由動(dòng)詞的形式?jīng)Q定,因此在學(xué)習(xí)英語時(shí)態(tài)時(shí),要注意分析動(dòng)詞形式及具體語境,想象在那個(gè)特定的時(shí)間動(dòng)作所發(fā)生的背景,這個(gè)動(dòng)作是經(jīng)常性動(dòng)作、一般性動(dòng)作、進(jìn)行性動(dòng)作、完成性動(dòng)作還是將要發(fā)生的動(dòng)作。
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