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Chen Wei isn’t at school today ________ ...

Chen Wei isn’t at school today ________ he is taking a robot competition in Shanghai.

A. so     B. because   C. before    D. if

 

B 【解析】 试题分析:句意:陈炜今天不在学校因为他在上海参加机器人竞赛。so所以;because因为;before在……之前;if如果。所以选B。 考点:考查连词。  
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考点分析:
考点1:形容词和副词
形容词是用来描写或修饰名词或代词,说明人或事物的特征或性质的, 形容词往往被译成“···的”
一般认为形容词+ly就变成了副词,如形容词quick加上-ly变成副词quickly。但是副词并不是那么简单哟!副词是一种用来修饰动词,形容词,全句的词,说明时间,地点,程度,方式等概念,一般放在行为在动词之前,be动词、助动词之后。副词的种类有:
1.一般副词主要分为以下几种:
        ①.时间副词, 如: often, always, early, now
        ②.地点副词, 如: here, there, above, outside
        ③.方式副词, 如: hard, well, badly, fast, slowly
        ④.程度副词, 如: very, quite, much, still, almost
2.疑问副词(放在特殊疑问句的句首), 如: how, when, where, why
3.关系副词(放在定语从句句首), 如: when, where, why
4.连接副词(放在名词从句句首), 如: how, when, where, why, whether

  
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