题目内容
【题目】The students were singing happily_________ I passed the school hall.
A. when B. unless C. though
【答案】A
【解析】句意:"当我经过学校大厅的时候学生们正在欢快地唱着歌."根据题干前半句The students were singing happily学生们正在欢快地唱着歌.后半句I passed the school hall.我经过学校大厅.可推知句子是一个时间状语从句.when当…时候.unless除非.though尽管.只有A选项符合题意.故选A.
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