A. | them;when | B. | which;that | C. | what;that | D. | which;when |
分析 劳伦斯.克莱文,一名来自美国的医生,他是几篇发表过的报告的作者.其中有一篇1953年的报告提出了阿司匹林可以减少心脏病风险的观点.
解答 答案:B.
which代指前句中的several published reports,在句中做of的宾语;定语从句中,one of which为主语,introduced为谓语,the idea为宾语,in 1953为时间状语.其后的从句是同位语从句,解释宾语idea的具体内容,即可以减少心脏病风险"是the idea的具体内容.因为该从句不缺少任何成分,所以用that引导,that只起引导该同位语从句.
点评 此题考查定语从句先行词和关系词的用法还有一个同位语从句.
定语从句与同位语从句的区别
1.定语从句是形容词性的,其功能是修饰先行词,起限定作用.
而同位语从句等同于它所修饰的名词,是名词性的,其功能是对所修饰的名词作补充说明.同位语从句一般跟在名词fact,hope,idea,news,doubt,suggestion,information,opinion,decision,discovery,truth,promise,statement,proble等的后面.
2.在定语从句中,that代先行词,在从句中不仅起连接作用,还充当某个句子成分,在作宾语时通常可省略.
而在同位语从句中,that只起连接主句和从句的作用,无意义,在从句中不充当句子成分,一般不可省.
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