Question

The teacher required that no one ________ late for class．

1. A.
   be
2. B.
   must be
3. C.
   should have been
4. D.
   was

Answer 1

A
动词demand，require，suggest，insist，advise，order等后接宾语从句时，从句中谓语动词应使用虚拟语气，即“should+动词原形(do/be done)”，should可省略。