Question

It is required that the students ______ mobile phones in our school, so seldom ______ them using one.

1. A.
   can’t use; will you see
2. B.
   not use; will you see
3. C.
   mustn’t use; will you see
4. D.
   shouldn’t use; you will see

Answer 1

B
考查虚拟语气和倒装。It是形式主语，that the students ______ mobile phones in our school是主语从句，require后面的主语从句要用(should)+do的虚拟语气，所以排除A,C；seldom表否定意义，用于句首时，后面句子部分倒装，所以选B。