题目内容

20.As can be judged from his expression,he is satisfied with the reply.

分析 从他的表情可以判断出他对于回答很满意.

解答 答案:As
解析:根据句意可知后面一个分句的内容"他对回答很满意"作前面一个句子的主语,而这两个句子又是分开的,故不可用用It作形式主语;只能将其视作一个定语从句,用As作主句的主语,用来代指后面的整个句子.

点评 本题考查定语从句,做此类题目时要仔细分析句子的结构确定句子的类型及所缺成分,再确定该由什么来充当所缺成分.

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