1.can be answered by most of the students

My wallet, containing over 100 pounds, was found in the street by a schoolboy.

2. She asked Mr. jones where had him been the previous night

3.Mrs. Jackson is the best teacher in this school

4. you met at the party last night is a famous actor

5.he was going to visit his grandmother the next day

6.If I knew the answer, I could help you

7.If i were a millionair, I could help all people

8.The rules may be forgotten quickly

9. The game should be cancelled 

10.This glass vase must be put in a safe place

11.swim as far as Jane

12.not as difficult as that one