III
1. have watched
2. Have you bought
3. taking
4. gives
5. called
IV
1. He likes carving eggshells.
2. He started his hobby 5 years ago.
3. People think that it's difficult and boring.
4. No, he learned everything from the Internet.
5. It may take two weeks to complete one shell.
V
1. Have you finished your homework yet?
2. We haven't had a vacation since last year.
VI
1. I have learned English since 2011.
2. I enjoy collecting stamps.
