He commanded that the students ______the classroom before he returned.

A．didn’t leave B．wouldn’t leave C．not leave D．couldn’t leave

C

解析試題分析：動(dòng)詞command如果作“要求”解時(shí)，后加動(dòng)詞的虛擬語氣形式，即should+動(dòng)詞原形。Should可以被省略。故選C。句意：他要求學(xué)生們?cè)谒貋碇安荒茈x開教室 。
考點(diǎn)：考查虛擬語氣。

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