He was just falling asleep _____ there was a loud knock on the door.
A.whileB.whenC.thenD.until
B

試題分析:句意:在他剛剛睡著的時(shí)候,有人在大聲地敲門(mén)。be doing sth …when …正在做某事的時(shí)候,突然…,固定句型,此處的when表示“突然”,故選B
點(diǎn)評(píng):連詞在中考中涉及到的很多,尤其在賓語(yǔ)從句、狀語(yǔ)從句、定語(yǔ)從句中連詞是必考點(diǎn)。平時(shí)學(xué)習(xí)過(guò)程中,掌握連詞的意思,及所表示的關(guān)系是至關(guān)重要的,這種關(guān)系的判斷可以通過(guò)句子意思的理解來(lái)選擇恰到的連詞。while表示當(dāng)…時(shí)候,強(qiáng)調(diào)兩個(gè)動(dòng)作同時(shí)進(jìn)行,多用于進(jìn)行時(shí)態(tài)中,只與延續(xù)性的動(dòng)詞連用,then然后,until表示直到...,常與not連用。
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