IV/

1.fed

2.would be

3.didn't talk

4.had had

5.swim

6.would chosse

7.hadn't bought

8.will turn

9.had

10.won't have

11.find

12.worn

13.don't change

14.will arrive

15.comes

16.asked

17.leaves

18.won't be

19.read

20.come

I/

1.study/will pass

2.shines/will walk

3.have/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.wait/will ask

II/

1.came/would prepare

2.lived/would visit

3.were/would play

4.were/would invite

5.studied/would be

6.had/would buy

7.did/would earn

8.got/would ask

9.won/would fly

10.met/would ask

III/

1.had been/would have play

2.had gone/would have had

3.had learnt/would has written

4.had take/would have arrived

5.had explained/would have done

6.had waited/would have seen

7.had come/would have arrested

8.had bought/would has tasted

9.had asked/would have emailed

10.had speaken/would has understood

Chúc bạn học tốt ^_^!!!
(Nếu thấy hay hãy vote 5*,cảm ơn và bình chọn là câu trả lời hay nhất để mik có động lực giải tiếp các BT khác nhé!)