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    8．________ it is so hot，I guess we can't do anything until after dark．（　　）
    A．In caseB．Now thatC．Even ifD．As though

    分析 由于天气太热，我想我们只有在天黑后才能干活了．

    解答 答案：B 题干中it is so hot是I guess we can't do anything until after dark的原因；in case万一，now that既然，由于，even if即使，as though好像；句意表达的是因果，是一个原因状语从句．故选B．

    点评 从属连词是连词的一种，用来引导名词性从句和状语从句．大致可分为三大类：that （无词义，不做成分）if，whether （表达是否的意义，但不做句子成分）； 连接代词：who，whom，whose，what，which，whatever，whoever，whichever（有词义，在句子中可作主语、表语、宾语）；连接副词：when，where，why，how，how many，how long，how far，however，whenever，wherever （有词义，作从句的状语）．

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