题目内容

Jim came into the room ______ Millie sat down on the chair last night.
A．asB．whileC．whenD．since
A

试题分析: 句意：昨晚靡丽坐在椅子上时，吉姆进了房间。as当……时，   
从句瞬间性动词，主从句同时发生； while当……的时候，从句为进行时，
延续性动词；when当……的时候，从句可与主句先后或同时发生，从句可
为瞬间和延续性动词，时或先后发生；since自从。came into与sat down为
瞬间动词，同时发生，故选A
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