Question

Mistake

1. After Mrs. Wang had returned to her house from work  she was cooking  dinner
2. Jimmy threw the ball high in the air, and Betty catching  it when  it came down.
3. Linda has worn her new yellow dress only once  since she buys  it.
4. Last week Mark told (A)me that he go tvery bored with his present job and is looking  for a new on e.
5. Having fed the dog, he was sat down to  his own meal.
6. When I turned on my computer, I was shocked to find some junk mail, and I delete  it all.

7. They are going to have to leave soon and so do we 
8. The boss laughed when the secretary has told him that she really needed  a pay rise.
9. The telephone rang several times and then stop  before I could  answer it.
10. Debbie, whose father is an excellent tennis player, has been playing tennis since ten years.
11. I have seen lotsof interesting  places when I went on holiday last summer. 

12. When my cat heard a noise in the bushes, she stopped moving and listen  intently 

Answer 1

Mistake

1. After Mrs. Wang had returned to her house from work  she was cooking  dinner -> cooked
2. Jimmy threw the ball high in the air, and Betty catching it when  it came down. -> caught
3. Linda has worn her new yellow dress only once  since she buys  it. -> bought
4. Last week Mark told (A)me that he got very bored with his present job and is looking  for a new one. -> was
5. Having fed the dog, he was sat down to  his own meal. -> sat
6. When I turned on my computer, I was shocked to find some junk mail, and I delete  it all. -> deleted

7. They are going to have to leave soon and so do we  -> are
8. The boss laughed when the secretary has told him that she really needed  a pay rise. -> had
9. The telephone rang several times and then stop  before I could  answer it. -> stopped
10. Debbie, whose father is an excellent tennis player, has been playing tennis since ten years. -> for
11. I have seen lotsof interesting  places when I went on holiday last summer.  -> saw

12. When my cat heard a noise in the bushes, she stopped moving and listen  intently  -> listened

Answer 2

1. Was cooking -> Cooked

2. Catching -> Caught

3. Buys -> Bought 

4. Is looking -> Was looking

5. Was sat -> Sat 

6. delete => deleted

7. do => are 

8. has told => told 

9. stop => stopped 

10. since => for 

11. have seen => saw 

12. listen => listened