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He commanded that the students ______the classroom before he returned.
A.didn’t leaveB.wouldn’t leaveC.not leaveD.couldn’t leave
C

试题分析:动词command如果作“要求”解时,后加动词的虚拟语气形式,即should+动词原形。Should可以被省略。故选C。句意:他要求学生们在他回来之前不能离开教室 。
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