помогите пожалуйста решить очень надо пожалуйстааа

1.Он врач. 2.Его жена - учитель.3.Их сын - бизнесмен. 4.Их дочь студентка. 5.У него есть эта кассета. 6.Это её журналы, а то - мои. 7.Это ваши сочинения. 8.У меня было несколько кнопок. 9.У них был этот диск. 10.У меня была эта книга. 11.Моя мама - журналистка. 12.Мой папа - юрист. 13.Мои бабушка и дедушка - пенсионеры. 14.У бабушки есть эти журналы. 15.Моя сестра - ученица. 16.У моей сестры есть эта кассета. 17.Его брат был музыкантом. 18.У его брата есть эти диски. 19.У неё есть несколько булавок. 20.У меня нет этих дисков.

спасибо!:)

Exercise 3. Rewrite the sentences, making the words in brackets plural.
1. The book recounts the (crisis)of the post-war period.
2. The ships were unloading their (cargo)on the(wharf).
3. Many people think that (parent-in-law)are potentially a nuisance.
4. Poisonous (gas) were being discharged from the exhaust pipes of the (bus).
5. He arranged that his books should contain detailed (index).
6. The eyes are sometimes (index) of character.
7. Shakespearean (hero)are generally the victims of circumstances.
8. (A mouse) can sometimes take the cheese without being caught in the (mousetrap).
9. Highly-coloured (fungus) were growing near the base of the tree.10. He wished to place certain (memorandum) before the committee.
11. He agreed that these were strange (phenomenon).
12. We cannot proceed on such unlikely (hypothesis).
13. (A serviceman) found guilty of desertion of duty are tried by (court martial).
14. The new (syllabus) will be drawn up according to different (criterion).
15. Television and newspapers are the mass (medium) of advertising.
16. The (thief) broke into the shop without attracting the attention of (passer-by).
17. Piano (solo) will be played by John Smith.
18. The police called for (eyewitness) to come forward and give evidence.
19. The accused (man) had carefully prepared what appeared to be good (alibi).
20. University (faculty) expect to receive complete(thesis) by the beginning of June.