12.
2 Have you ever flown a kite?
3 There is nothing in the box. I have just emptied it.
4 Simon went to the theater last week.
5 Did you eat all the chocolate cake last night?
6 Have you worn your new hat yet?
7 I drank twelve glasses of water yesterday.
8 Dora has visited five European countries so far.
9 Did you come to work by bus yesterday?
10 Did you go to Samantha's party last Saturday?