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  3. Don’t turn off the computer before closing all programs_______you could have ...

Don’t turn off the computer before closing all programs_______you could have ...

admin2020-12-24  32
问题 Don’t turn off the computer before closing all programs_______you could have problems．
选项 A.or

B.and

C.but

D.so
答案A
解析考查并列连词。此处考查句型：祈使句+and／or+句子。
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