题目内容
19．You can't watch TV you finish your homework．（ ）| A． | before | B． | if | C． | while | D． | as |
分析 在你做完作业之前不可以看电视．
解答 答案：A；before"在…之前"；if"如果"；while"当…时候"；as"像…一样"；根据句中信息"You can't watch TV，你不可以看电视"可以推测应该是"在做完作业之前"，故选A．
点评 连词的用法都比较多，熟记其基本应用规则，了解其区别，是做好此类题型的关键．
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