Don’t turn off the computer before closing all programs, _________ you could hav
题型：不详难度：来源：
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答案
A |
解析
试题分析：句意：所有的程序关闭之前不要关上电脑，否则，你可能有问题。or 或者，否则； and 而且； but 但是；so 所以。根据空格后you could have problems，可知如果不按照前面的去做，就会有问题。故选A。
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举一反三
They are talking _____ they had been friends for years, while in fact they have known each other for only two hours. | A．even though | B．as though | C．now that | D．until |
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--- This is the same watch ______ I left on the playground yesterday.
--- How can it be possible? I bought _____ the other day.| A．that; one | B．that; it | C．as; one | D．as; that |
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_____ the majority of people you will meet when travelling are sure to be friendly, there are dangers-theft being the most common.| A．Since | B．Unless | C．While | D．Once |
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We know _____America is great not because it is perfect but because it can always be made better and _____ the unfinished work of perfecting the union falls to each of its citizens.| A．不填；不填 | B．that ; that | C．that ; 不填 | D．不填；which |
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| In case of fire, stay low to the ground in a smoky room, ________ smoke always rises towards the ceiling. |
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