Question

It was required by the headmaster that all the students        at the meeting

1. A.
   should present
2. B.
   present
3. C.
   attended
4. D.
   be present

Answer 1

D
考查虚拟语气。require要求，从句用should + v原形的虚拟语气，should可以省略。be present at出席，根据句意选D。