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