V. Circle the mistakes ( A,B,C or D) 1. New York is one of most polluted cities in the USA A B C D 2. In the past, we might call our friends on the watches A B C D 3. How much hours does he usually play a guitar? A B C D 4. Our teacher gives often us a lot of homework. A B C D 5. How often does Ba and Lan go to the zoo ? A B C D 6. She plays badminton in the yard at the moment. A B C D 7. The children usually are interested in computer games. A B C D 8. We have English at Monday and Friday. A B C D 9. How often are they going to stay in Ha Long Bay ? - For a week. A B C D jup e với