1. By the time I got there, ……….

a) I will have been fired owing to being late                       

b) the conditions seem quite serious

c) someone had broken into my office                                

d) it is in vain

 

2. By the time the Gulf war broke out, ......................... .

a) we'll have escaped to another planet                               

b) I wish we could try another to succeed in persuading her

c) it was necessary in the middle of the road

d) the army had given the red alert

 

3. By the end of the 10th century,.................................... .

a) this synthesis is very valuable

b) in fact the archaeologists were wrong

c) doctors had known much about herbal medicine

d) since they questioned the thieves

 

4. .......................... the prisoners will have escaped via the tunnel.

a) By the time the police arrested the murderers

b) By the time the guards become aware of the hole in the floor of the cell

c) While they were working in a factory to earn their bread

d) In the earlier periods of the century it was impossible to breathe in the city

 

5. By the beginning of the last century, human beings ................ anything about electricity.

a) had not known

b) will have known

c) has to know

d) was able to know

 

6. By the time the rats ran away from the cats, the cats ……………..one of them.

a) eat               b) eating          c) will have eaten       d) had already eaten

 

7. By noon, the mechanic ......................... the trouble in the car.

a) is repairing

b) repairs

c) have repaired

d) will have repaired

 

8. By the time they start the play,..........................

a) the theatre will have filled up

b) her parents told her to be more careful

c) available care isn't adequate at schools

d) inaccurate responses are being measured

 

9. By the time the police caught him,..........................

a) his partner will have confessed robbing the bank

b) his friend in the jail had already told the truth

c) he will co-operate with me

d) they have changed their mind

 

10. By the time they learned the price,.....................................

a) they will be celebrating his eighth birthday

b) he should have sentenced at least some of the rioters

c) so that they will make an interpretation of the last occasion

d) they had already bought it