11.How long is it since they bought the house?

→When did they buy the house?

12.It’s years since we decorated this room

→We haven’t  decorated this room for years.

13.I would like the school holidays to be longer. 

→ I wish the school holidays were longer

14.John is not old enough to join the club. 

→John is too young to join the club

15

16..Ican't get my feet into these shoes .

→ These shoes can't be got into by my feet. 

17.I've never met such a famous person before

→It's the first time I have met such a famous person 

18.I'm very pleased that we will meet again soon.

→I'm looking forward to meeting you again soon.

19. Although he had a good salary, he was unhappy in his job.

→In spite of having a good salary, he was unhappy in his job.

20.If I were you ,I'd look for another job.

→I suggest that you should look for another job

21.I saw him come out of the house.

→He was seen to come out of the house.

22.I saw him come out of the house.

→ He was seen to come out of the house by me

23.Frank is very good at tennis.

→ Frank plays tennis very well