题目内容
【题目】
(2012 江西瑞金联考)The teacher commanded that the students __________ the classroom before he returned.
A. didn't leave
B. wouldn't leave
C. needn't leave
D. shouldn't leave
【答案】D
【解析】句意:老师命令说在他回来之前,同学们不能离开教室。command命令,其后的宾语从句用虚拟语气,谓语动词的构成为should do, should可以省略。选D。
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