Ex 8

2 graduates- will have studied

3 sell- will buy

4 get- will call

5are not able- are showed

6 had turned off- left

7 finishes- will take

8 were having- arrives

Ex 9

1 cook-> cooked

2 invited-> invite

3 receiving->receive

4 see-> be seeing

5 will leave- have left

Ex10

2 A

3B

4A

5B

6B

Ex4

2 will have been cooking

3 will have saved

4 will have checked in

5 will have been working

6 will have been teching

7 will have been

8 will have finished

9 will have been driving

10 will have left

11 will have been working

12 will have repaired

13 will have built

14 will have been writing

Ex 5

1 By next month, my mother will have lost a lot of weight

2 By noon, I will have painted the room blue

3 By May Sam will have learned how to drive

4 Jill will have been doing her maths homework by the time you arrive

5 By 9 pm she will have got ready for the party for 3 hours

6 My parents will have been driving a day by the time they reach the village

7 Our teacher will have been teaching for 20 years by the time he retire

8 By the evening I will have made all the preparations for the party

9 The Prime Minister will have been in office for 4 years by the next election

10 By the time he is 15 years old he will have learned English for 7 years

Ex6 

2 will be talking

3 will be working

4 will have destroyed

5 will be staying

6 will  have been teaching

Ex7

2 will be working

3 will get

4 will have been working

5 won't eat

6 will have finished

7 will be watching

8 will land

9 will haev been

10 will have been married