Английский язык Объедините два предложения, используя относительное местоимение, выделенное жирным шрифтом

4) A vacation is a period of the year. Universities and colleges and schools are officially closed.

WHEN

ответ

5) A course book is a textbook. Students and teachers use it as the basis of a course.

THAT

ответ

6) A teacher is a person. His or her job is to show students how to learn, as well as what to learn.

WHOSE

ответ

Задание немного не понятное.  Возможно что-то типа этого.

Travelling about Africa he learnt a lot about African traditions.
Путешествуя по Африке, он узнал много об африканских традициях.

Утвердительное предложение с причастным оборотом.
Travelling about Africa - причастный оборот, обстоятельство времени
he - подлежащее, личное местоимение в 3 лице ед. числа
learnt - сказуемое, глагол в Past Indefinite/Past Simple
a lot- определяющее слово/местоимение
about - предлог
African - прилагательное
traditions - исчисляемое существительное во множ. числе

1. My name is Katya. 2. I am 14 years old. 3. I Russian. I am from St. Petersburg. 4. I am a student. 5. My favorite sport - tennis. 6. I am interested in music. 7. My favorite subject - English. 8. My dad - a programmer. He is not into politics. 9. My mother - a dentist. She is interested in art. 10. We are always busy, but we are very happy to be together. 11. Whose pen? - This is my pen. 12. Whose book is this? - It is your book. 13. Whose is this table? - It is my brother's table. 14. Whose bag? - This is my mother's bag. 15. Whose is this pencil? - This is my sister's pencil. 16. This is your notebook? - Yes. 17. This is a notebook of your brother? - No this is my notebook. 18. Where is your desk? - He is in the middle of the room. 19. Where is your pen? - She's in my pocket. 20. Where is your book? - She is on the table. 21. Where is your mother? - She's at work. 22. Where is your brother? - He is at school. 23. Where is your sister? - She is at home. 24. Whose is this pencil? - This is my pencil. - Where's my pencil? - He is on the table. 25. Whose watch? - It's my watch. - Where's my watch? - They are on the table.