Ответ:

1. How long is the movie?

2. а тут понятия не имею... Возможно How do we play tennis?, но тогда вопрос смысла не имеет.....

3. How much does your car cost?

4. How many boys are in your class?

5. How big is her kitchen?

6. How heavy is that box?

7. Тут тоже не уверен, может How quickly will the concert begin?, но так вообще никто не говорит

8. How much milk do you need for a cake?

9. How did they go to Scotland?

10. How long have you known Jill?

Объяснение:

Если задавать вопросы без how, то тогда 2 и 7 получатся:

2. On what days do we play tennis?

7. When will the concert begin?