According to the school rules, no student _______ go out of school without the permission of the teachers.

---Is John coming by train?    ---He should, but he ________ not. He likes driving his car.

She _____ your birthday party, but she had to look after her mother in hospital．

－Mike, I can’t stop playing computer games.－For your eyes, I am afraid you ______.

I have never heard______.