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    精英家教网 > 初中英语 > 题目详情

    ---Why are you busy these days?

    --         I am writing a book.

    A．since             B．as               C．for               D．because

     

    【答案】

    D

    【解析】

    试题分析：在表示原因时，for表示推测的原因，一般只能放在句子中间，引导并列句；as从属连词，引导原因状语从句，常位于句首。表示众所周知，显而易见的原因。because：语气最强，表示直接原因，可用于回答 why 提出的问题、引导表语从句、用于强调句等；since所表示的原因都是人们已知的，即对已知事实提供理由，而不是表示直接原因。since 比 as 语气稍强，且比 as 略为正式，它引导的从句通常放在主句之前，有时也放在主句之后：句意：这些天你为什么这么忙？——因为我正在写一本书。结合语境可知选D。

    考点：连词辨析

    点评：连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词。连词的用法都比较多，语义之间还有交叉，熟记其基本应用规则，了解其区别，注意固定搭配对象，是做好此类题型的关键。

     

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