Нужно ошибки исправить где + не надо там правильно

2 They got dinner at 7 o'clock.
9 I prefer to buy clothes in boutiques.
15 Who plays the violin?
16 I am going to fly to NY next month.
19 What do you mean?
20 I don't understand the plan.
22 She has won the prize.
24 I think he is a very intelligent boy.
25 It often rains in autumn.
27 I'm a busy teacher, aren't I?
28 She wants to improve her pronunciation.
29 I will be waiting for you at the station.