1. You should sit straight up at the table.
2. You shouldn't eat with your fingers and talk with your mouth full.
3. When Sandra puts on her blue jeans, she looks very slim in them.
4. Len is really good at taking photos and he enjoys doing that.
5. You must come to school in time.
6. Will you join us for dinner?
7. Washing up is a boring activity.
8. Bob doesn't like to work at the computer at all.
9. Lily looks rather beautiful in the photos of magazines.
10. Is it OK for you if we meet at the square at 7 o'clock?
11. You should spend a lot of time on studying.
12. I won't go home, nobody is waiting for me there.
13. You shouldn't shout at people.
14. Can you look after my dog while I am on holiday?
15. Such things can happen to everybody.