--- Any news about the fire?
--- Nearly 20 people ______ from the burning building by now.
A.rescuedB.have been rescuedC.have rescuedD.were rescued
B

試題分析:考查時(shí)態(tài):句意:--有火災(zāi)的消息嗎?--早現(xiàn)在為止,近20人已經(jīng)從燃燒的大樓中被救出了。和by now連用用現(xiàn)在完成時(shí)。還有people和rescue是被動(dòng)關(guān)系,用現(xiàn)在完成時(shí)的被動(dòng)。選B。
點(diǎn)評(píng):英語(yǔ)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(yǔ)時(shí)態(tài)時(shí),要注意分析動(dòng)詞形式及具體語(yǔ)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。這題關(guān)鍵是by now這個(gè)詞組是明顯的暗示。
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