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Don't turn off the computer before closi...

Don't turn off the computer before closing all programs, ________   you could have problems.

A. or                B. and

C. but               D. so

 

A 【解析】 试题分析:考查并列句的连词。警示要所有程序都关闭后再关电脑,否则将有问题。or否则,要不然。 【名师点睛】这题使用固定句型:祈使句+and/or+简单句。固定句型考的是平时学生的词汇和短语的积累量,对常见的固定句型要了然于心,了解每个选项的含义是做好此类题型的关键,对于这类题,可从句意着手,同时,对于平时的学习要多进行积累词汇,考试时才能很好的完成。  
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