题目内容
15．Work hard， you'll pass the exam．（ ）| A． | and | B． | or | C． | but | D． | if |
分析 努力学习，你就会通过考试．
解答 答案：A；
根据语境以及上下文，本题考查的是连词的用法．根据设空处前后句的句意"努力学习"和"你就会通过考试"，可知前后句之间是顺接关系，所以用连词and；构成句式：祈使句+and+主句，祈使句相当于一个条件状语从句，故选A．
点评 比较和分析选项中连词的不同含义及其用法是解答该题的关键；还要根据句中信息正确推测该句句意，进而作出解答．
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