题目内容
16.Your teacher will be pleased _____ you finish your homework on time.( )| A. | if | B. | unless | C. | whether | D. | until |
分析 如果你按时完成作业,你的老师将会很高兴的.
解答 答案A if意为"如果"引导条件状语从句中;unless意为"除非",引导条件状语从句中,相当于if…not…;whether意为"是否";until意为"直到…才".根据"you finish your homework on time"可知在完成作业的条件下,老师才会高兴.所以要用if来引导条件状语从句中.故选A.
点评 首先要掌握if,unless,whether,until这几个从属连词的意思,然后根据具体语句做出正确选择.
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