题目内容

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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