11D. B and C
12B. How much
III,
1. Where are the children playing marbles?
2. What about running in the morning?
3. We don't usually visit our old friends on the weekend
4. What fresh milk !! / How fresh the milk is!
IV,
1. What is your date of birth?
2. Why don't you drink some orange juice?
3. What is your address?
4. Mai is tallest students in his class
5. Watching is more interesting than reading
6. You ought not to watch TV too late
7. Children prefer watching TV to reading books
8. It takes us three hours to go to Ho Chi Minh city by car
9. It is a ten-day trip
10. What is the price of that pen ?
How much does that pen cost ?
11. My house has four bedrooms