Помогите мне пожалуйста по английскому языку надо составить правильное предложение

я не понимаю англ

Ты купил самые дороие часы а магазине?

cheapest - самые дешевые

Ой. Ты купил самые дешевые часы в магазине?

да

My sister is younger than me. Who is the oldest in the class? Concorde is the fastest passenger plane in the world. My book is more interesting than your book. Peter bought the most expensive watch in the shop. Did you buy the cheapesy watch in the shop? English is much more difficult than German. The weather is much better today than yesterday.

2 My sister is younger than me3 Who is the oldest in the class?4 Concorde is the fastest passenger plane in the world5 My book is more interesting than your book6 Peter bought the most expensive watch in the shop7 Did you buy the cheapest watch in the shop?8 English is much more difficult than German9 The weather is much better today than yesterday