Ответ:

1. been looking

2. sold

3. been traveling

4. has answered

5. known

6. seen

7. been waiting

8. been writing

9. visited

10. been having

Объяснение:

Ответ:

1.I've been looking for you for an hour!

2. How many paintings have you sold?

3. We have been travelling for a couple of weeks now

4. The professor has answered more than 100 questions about the Louvre

5. John has known Cynthia since primary school

6. I've seen most of his paintings

7.How long have you been waiting?

8.Have you been writing your essay all morning?

9. How many art galleries has Dan visited today?

10. How long have you had this painting by van Gogh?

Объяснение: