Добрый день! помогите пожалуйста сделать это задание, буду очень признательна

2 My sisteryounger than me.
3 Who is the oldest in the class
4 Is Concord the fastest passenger plane in the world
5 My book is more interesting than your.
6 Peter bought the watch in the most expensime shop.
7 Did you buy the watch in the sheapest shop
8 German is much more difficult than English.
9 Тoday the weather is much better than yesterday.