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I am afraid he’s more of a talker than a doer, which is ________ he never finishes anything. 答案 why [考查表语从句。句意：我恐怕他是一个空谈家而不是一个实干家，那就是他一事无成的原因。本文“which is...”引导的一个非限定性定语从句中有一个表语从句，根据句意用“why”引导。] 他病了，这是由于他吃得太多的缘故。 【误】He got ill; this was why he had eaten too much. 【正】He got ill; this was because he had eaten too much. 误点：________________________________________ 知识点四 同位语从句 1.同位语从句常放在fact, news, idea, truth, hope, problem, information, belief等词的后面，对前面的名词作进一步解释、说明。 Where did you get the idea that I could not come? 你在哪儿听说我不能来？ The problem whether we should continue to do the experiment hasn’t been solved. 我们是否应该继续做实验这一问题还没解决。 2.同位语从句与定语从句的区别： 同位语从句是对前面名词的内容作进一步的解释、说明，引导词只起引导作用，不在句中作任何成分，一般不可省略。定语从句是对前面名词进行修饰、限制，引导词在句中作一定的句子成分。 The news that they had won the game soon spread over the whole school. 他们赢得比赛的消息很快就传遍了整个学校。(同位语从句，进一步解释news的内容) The news that you told me yesterday was really disappointing. 你昨天告诉我的消息真的很令人失望。(定语从句， 修饰news) (2017·浙江，16)The only way to succeed at the highest level | 
