题目内容
16．He decided to buy the book it was expensive．（ ）| A． | before | B． | though | C． | because | D． | if |
分析 他决定买这本书，即使它很昂贵．
解答 答案：B before意为"在…以前"引导时间状语从句；though意为"即使，尽管"引导让步状语从句；because意为"因为"引导原因状语从句；if意为"如果"引导条件状语从句．根据"it was expensive"以及"decided to buy the book"可知尽管很昂贵，也要买这本书，所以要用though，故选B．
点评 首先要掌握before，though，because，if这几个连词的意思及用法，然后结合具体的题意做出正确选择．
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