1. was being played 

2. will be learn

3. to have escaped

4. served

5. stood

6. will walk

7. won't arrive

8. being allowed to stay

9. Have you been /  went

10. arrived / had already started

11. is now crow / looking

12. want

13. not smoke

14. be found

15. would go

16. not sent

1. what time ( play ) when we came in ?

⇒ was being played

2. They ( learn ) English from nine to ten in this room. Don't let anyone disturb them then.

⇒ will be learning

3. The prisoner is thought (escape) …………………… by climbing over the wall yesterday.

⇒ to have escaped

4. He ( serve ) in the army in the last war.

⇒ served 

6. " You have just missed the last train ", " never mind, i ( walk ).

⇒ will walk 

7. Come to see me at 5 this cyter noon. I ( not / arrive ) home until 4.30.

⇒ will not arrive

8. My children enjoy ( allow ) ( stay ) up late when there is a special on TV.

⇒ being allowed to stay

9. ( you / be ) to Paris ? Yes I ( go ) there a couple of years ago.

⇒ Have you been - went

10. When Peter and I ( arrive ) at the cinema, the film ( already / start ).

⇒ arrived - had already stảted

11. The city ( now / corw ) with people who ( look ) for jobs.

⇒ is now crowded - are looking

12. You must study work hard if you ( want ) to pass the exam.

⇒ want

13. You'd better ( not smoke ) here.

⇒ not smoke

14. Water can't ( find ) here.

⇒ be found

16. Had i met him yesterday i ( not send ) him a letter.

⇒ didn't sent