`1`. Some parents would rather their children didn't have to take so many exams.

Giải thích : Would rather + S + didn't + V : (không ) Muốn ai đó làm gì

`2`. It's high time for us to leave 

Hoặc : It's (high) time we left.

Giải thích: 32. Đã đến lúc ai đó làm gì:
`-`  S + should/ had better + V + O + now
`=` It is (high) time + S + Vpast + O
`=` It is (high) time + for + S.O + to + V + O

1. will you ever think about finding a flat of your own ?

time it's ......time you thought............about finding a flat of your own

3. this summer , i would rather book a holiday in Monaco than Lyons

prefer this summer , i ...prefer book.....a holiday in Monaco rather than Lyons

4. why didn't you tell me yourself that you were leaving ?

rather i'd.........rather you told...........me yourself that you were leaving

5. she wants to be more like her mother

wishes she............wishes he were .....................more like her mother

7. you should have checked the oil before you set out

better it.....had better...you had checked the oil before you set out

8. i was about to buy the painting , when i realised it was a fake

if i would have brought the painting .....if i had realised.....it was a fake

9. i didn't see the tv programme because i didn't know it was on

known if..had known..the tv programme was on , i would have seen it

10. i think you should go on holiday

were if................I were you..........................., i would go on holiday

11. you shouldn't have told Sally my secret

told i'd....................better you told............................ Sally my secret

13. you should be in bed now. it's late

went it's...................time you went.....................................to bed

16. it's a pity it's a raining

stop i..................wish it would stop..............................raining

17. she couldn't tell you because she didn't know

would had.............she known,shw would have...............told you

19. we should have left by now if we don't want to miss the bus

time it's..........time we will have left by now.................if we don't want to miss the bus

20. i would have liked you to have informed my parents about my change of plan

rather i..........would rather you had informed.......my parents about my change of plan

22. you ought to have set a wedding date by now

time it's..............time you had set.................a wedding date