Choose the underlined part among A,B,C or D that needs correcting and correct it

Ex choose the underlined part among A,B,C or D that needs correcting and corrects

16. In recent yeas, educated women have been marrying later, that=>bỏ'that' means that they have fewer years in which to produce offspring

17. when you look in the mirror, you see your own face in the glass, that is=>is a reflection of thetrue is image

18. The earth was flat, was belived=>belived by most people in the fifteenth country

19. Physicists are scientist whose study=>who matter and energy, as well as their patterns of interaction

20. The water temperature in a spring depends on that of the soil wher=>when the water flows

6. We were at home having our aniiversảy dinner when=>which my uncle was calling to congratulate us last night

7. Paul took=>has taken many trips to Asia since he started his own import- export business

8. The children had been playing for=>had been played for the last two hours, but they don't seem to be tired yet

9. Up to know=>knowing Peter wrote five novels and over six short stories

10. Iam polishing this table all the morning but she isn't=>hasn't been satisfired with it yet