3. How much are these books?

 How much​ do these books cost ?

4. I often go to bed at nine fifteen.

 I often go to bed at a​ quarter past nine.

5. She likes Physics best.

 Her favorite​ subject is Physics

6. Classes always finish at three forty - five

 Classes always finish at a​ forty past five

7. How much is this school bag?

 How much​ does this school bag cost?

8. Should we go to the movies?

 What about​ going to the movies ?

9. They like playing soccer

 They enjoy playing soccer
10.The red dress is more expensive than the blue one