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

試題分析：動詞command如果作“要求”解時，后加動詞的虛擬語氣形式，即should+動詞原形。Should可以被省略。故選C。句意：他要求學(xué)生們在他回來之前不能離開教室 。
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