3.1b hadn't been

2a wouldn't have been

3d asked

4b she had done

5d steal

6a would have been/hadn't lied

7b invested

8c hadn't advised

9a could have climbed

10b could climb

11a had known/could have phoned

12b told

13c will happen

14a had realized/would stop

15a stop

16b had discovered/would have informed

17c had gone/would have given

18b were/would answer

1.1 study/will pass

2 shines/will walk

3 has/will see

4 come/will be

5 earns/will fly

6 travel/will visit

7 wear/will slip

8 forgets/will give

9 go/will listen

10 don't play/won't come

12 eat/won't lose 

13 don't make/won't love

14 don't hurry/won't catch

15 send/will come

16 won't understand/whisper

17 won't survive/don't take

2.1 will have

2 looked

3 had fed

4 would understand

5 would arrive

6 would have had

7 swim

8 press

9 had asked

10 would call

3.1b 

2a 

3d 

4b

5d

6a 

7b 

8c 

9a 

10b 

11a 

12b

13c 

14a 

15a 

16b 

17c 

18b 

1.1 study/will pass

2 shines/will walk

3 has/will see

4 come/will be

5 earns/will fly