问题
选择题
He commanded the students ______ the classroom before he returned.
A.did not leave
B.leave not
C.not to leave
D.not leaving
答案
答案:C
题目分析:考查虚拟语气。句意:他要求学生们在他回来之前不能离开教室 。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。