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

作者: tihaiku 人气: - 评论: 0
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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