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.