Răspuns:
1. I'm sure that bag isn't yours.
That can't be your bag.
2. My advice is to talk to your teacher about it.
I think you should talk to your teacher.
3. I'm sure that Sam knows the answer.
Sam, do you know the answer?
5. I'm sorry. I'm late. It was necessary for me to go to the doctor's.
Im sorry for being late it was necessary, me to go to the doctors place.
6. Perhaps Cathy in at the library.
Cathy why are you at the library?
7.what is your advice?
What do you think you should do?
