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I was just falling asleep ____ there was a loud knock at the door.
A.whileB.whenC.untilD.as soon as
B

试题分析:while当……时,强调主从动作同时发生;when当……时;until直到;as soon as一……就。句意:当传来大声的敲门声时,我刚睡着。结合语境可知我睡着在先,故选B。
点评:连词在句子中主要起联系上下文的作用,他们之间的区别就是表示逻辑关系的不同,所以在解题时先要理解上下文含义,然后根据上下文逻辑关系选择合适的连词。连词的用法都比较多,语义之间还有交叉,熟记其基本应用规则,了解其区别,注意固定搭配对象,是做好此类题型的关键。
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