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Don’tturnoffthecomputerbeforeclosingallprogramsyoucouldhaveproblemsA.orB.andC.butD.so

题目详情
Don’t turn off the computer before closing all programs       you could have problems
A.or B.and C.but D.so
▼优质解答
答案和解析
A

根据you could have problems可知,此处是虚拟语气的用法,而选项中只有or和but是和虚拟语气连用的,用法为:有时候,虚拟不是通过if引导的条件句来表示,而是暗含在上下文中。用otherwise、or, even though等表示与上文的情况相反,从而引出虚拟语气。如:I lost your address.otherwise,I would have visited you long before。有时候,虚拟条件通过but暗示出来。如:He would have given you more help,but he was too busy。or 和but的区别就是,or前面是事实,后面用虚拟,而but是前面用虚拟,后面是事实。本题中,后面是虚拟的内容,因此选择A,意为,在关闭所有程序之前,不要关闭电脑,否则你会遇到问题的。
【考点定位】考察虚拟语气的用法。