20．The thieves ran away as soon as the alarm _____．（　�。�
A．gave offB．put offC．showed offD．went off

分析 警鈴一響，小偷們就跑走了．

解答 答案D．
give off 發(fā)出（光，煙，氣味等）；put off延期；脫去（衣、帽等）；show off 炫耀；go off（警報(bào)）響；離開．根據(jù)時(shí)間狀語(yǔ)從句的主語(yǔ)"the alarm"可知句子表達(dá)的意思是"警鈴一響，小偷們就跑走了"；故答案選D．

點(diǎn)評(píng) 本題考查動(dòng)詞短語(yǔ)的辨析．英語(yǔ)中有的詞組沒(méi)有捷徑，只有平時(shí)加強(qiáng)記憶，要注意區(qū)別，記憶的時(shí)候不能忽視，這是常見(jiàn)的命題方式．平時(shí)要加強(qiáng)記憶，做題時(shí)，別忘了要結(jié)合上下文句意判斷．

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