Ребят помогите пожалуйста составить 10 предложений со степенями сравнений

Don’t go by plain. It is a lot more expensive.What is the best room in the hotel?What is the longest river in the world?John is the cleverest student in our class.What is the happiest day of your life?Today is the coldest day of this winter.What is the most interesting film you have ever seen?This dish was the most delicious I have ever tasted.Let’s go by bus. It is much cheaCan you speak a bit more slowly?per.