题目内容
12.Exactly ________ the potato was introduced into Europe is uncertain,but it was probably around 1565.( )A. | how | B. | that | C. | when | D. | which |
分析 土豆传入欧洲的确切时间不确定,但是大概是在1565年左右.
解答 答案是C.本题考查主语从句中的引导词;题干中is前为主语从句;根据下文"但是大概是在1565年左右"推断主语从句说明的是土豆传入欧洲的确切的"时间"故用when引导主语从句,答案是C.
点评 名词性从句考查的关键是连接词的选用和语序,因此,我们首先要搞清从句的性质,掌握各连接词的用法,在此基础上判断.此外,关注名词性从句用陈述语序.
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