题目内容
12.There is no simple answer,_______ is often the case in science.( )A. | as | B. | that | C. | when | D. | where |
分析 科学往往如此,它没有一个简单的答案.
解答 答案A.
分析句子结构可知,逗号之前是主句,逗号之后是非限制性定语从句,从句中缺少主语,从而排除C、D项;"that"不能用于非限制性定语从句中,因此A项符合语境,"as 正如",故选A.
点评 本题考查非限制性定语从句.解答此类题目首先要分析句子结构,非限制性定语从句中逗号是一个明显的标志,然后分析非限制性定语从句中的成分,如果缺成分用关系代词,如果不缺成分用关系副词.
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