Объяснение:
Аm,або I'm not
Іs,або isn't
Іs,або isn't
Іs,або isn't
Аre,або aren't
I'm not,або I am
1. The baby is fed
2. The phone call is answered by the receptionit
3. We are served by the waitresses.
4. The cow is milked by the farmer
5. Fancy dress costumes are worn at Carnival
6. I am helped by my father
7. The dishes are washed
8. The teacher is asked questions
9. Mother is driven to work by dad
10. The car is repaired by the mechanic
11. Letters are typed by the secretary
12. Meat is sold at the butcher's.
13. Granny is visited at hospital
14. Coffee is grown in Colombia.
15. The trousers are ironed.
16. Sushi is eaten in Japan.
17. The operation is performed by the surgeon.
18. A book is borrowed from the library.
19. The problem is explained by the teacher
20. The patient is carried by
The orderly.
21. Presents are given at Christmas.
22 The exam is done by the student.
23. The violin is played by Carol.
24. Lunch is cooked by Sally and her grandma.
25. Apples are picked up in summer.
1 The Portuguese explorer Vasco da Gama hadn't seen penguins before he travelled to South Africa in 1497. X
2 After he had made a pilgrimage to the city of Mecca in 1325, Ibn Battuta decided to become an explorer. ✓
3 Many explorers had tried to climb Mount Everest before Tenzing Norgay and Edmund Hillary reached the peak in 1953. ✓
4 People in Europe hadn't eaten potatoes until Christopher Columbus brought some from America. X
5 More than 400 years after Magellan had sailed around the world, the US submarine Triton made a similar journey underwater. ✓
1. am или I'm not
2. is или isn't
3. is или isn't
4. is или isn't
5. are или aren't
6. I'm not или I am
В каждом из вариантов можно и то и другое вставить.