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Work hard at your lessons, ______ you’ll fail the exams again.
A.andB.butC.orD.which
C

试题分析:考查固定句型:祈使句+and/or+简单句,句意:努力学习,否则你又会不及格了。选C。
点评:固定句型:祈使句+and/or+简单句,是高考的常考点,这个句型还可以变成:名词+and/or+简单句。
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