How the fire in the dancing hall started _________ a mystery.
A.to remainB.remains
C.is remainingD.is remained
B

試題分析:句意:舞廳的大火如何開(kāi)始的仍然是一個(gè)迷。這里How the fire in the dancing hall started是主語(yǔ)從句,從句做主語(yǔ)謂語(yǔ)動(dòng)詞用單數(shù),remain這里是系動(dòng)詞,沒(méi)有進(jìn)行時(shí)和被動(dòng)形式,故選B。
點(diǎn)評(píng):本題難度適中。動(dòng)詞語(yǔ)態(tài)的考查與一定的語(yǔ)境結(jié)合一起增加了試題的難度,有的考生時(shí)態(tài)的用法背的很熟,但在不同的語(yǔ)境下,就做不對(duì)了,提醒考生一定要會(huì)分析理解語(yǔ)境。這里考生必須了解remain可以作系動(dòng)詞的用法。
即學(xué)即練:We must learn to conserve what ________.
解析:B。句意:我們必須學(xué)會(huì)保存那些剩余的資源。
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