The key answer of exercise 1

a)

1. I was at work
2. They weren’t at home
3. He was at a restaurant
4. We weren’t at school
5. Were you at work
6. She was at the airport
7. Was he late
8. I wasn’t in a hurry
9. She wasn’t in a hotel
10. We were in a café with fringes

b)

1. Was Picasso a painter? Yes, he was.
2. Were the Beatles from the United States? No, they weren’t.
3. Was Amy Winehouse American? No, she wasn’t.
4. Were Charles Dickens and Jane Austen writers? Yes, they were.
5. Was Carmen Miranda Brazilian? Yes, she was.
6. Were Monet and Matisse musicians? No, they weren’t.
7. Was Michelangelo a musician? No, he wasn’t.
8. Were Steve Jobs and Thomas Edison American? Yes, they were.

c)

1. Were; was
2. were; was
3. Was; wasn’t
4. Were; weren't
5. was; was
6. Were; weren't