1. I’m sure that you didn’t lock the front door. Here is the key.

You can’t ___________________________________________________________

2. It was quite unnecessary for you to carry all those parcels home yourself.

You____________________________________________________________

3. It was careless of you to leave the windows open last night.

You shouldn’t_______________________________________________________

4. I’m sure it wasn’t Mrs. Mai you saw because she is in Boston.

It can’t____________________________________________________________

5. I’m sure Alison made arrangement. I recognized her voice.

It must____________________________________________________________

6. Maybe John’s working this weekend.

John ____________________________________________________________

7. I’m sure he didn’t know that his brother was seriously ill.

He couldn’t possibly__________________________________________________

8. I didn’t apologize. That was wrong of me.

I should____________________________________________________________

9. I am sure it was Judy that I saw in town this morning

It must____________________________________________________________

10. It wasn’t necessary for me to go out after all.

I needn’t___________________________________________________________