21. They have lived in Ho Chi Minh city for ten years,. A. don't 22. If they knew where the man is, they....tell the police they ? B. isn't C. hasn't D. haven't A. will B. would C. can D. won't IV. Find one mistake in the four underlined parts of each sentence. 23. Are you interested between learning English? A В C D 24. I haven't written any letters home since two months. B C D 25. The teacher said that she would attend the class meeting following day. В A A C D 26. If it rains, she will stays at home and watch TV. A B C D
