问题
required that the students _____ mobile phones in their school, so seldom _____ them using one.
A:should not use; you will see
B:mustn’t use; will you see
C:not use; you will see
D:not use; will you see;
B:mustn’t use; will you see
C:not use; you will see
D:not use; will you see;
正确答案是：
