III. Put the verbs in brackets in either past simple or present perfect. 16. They (buy) _______a new house last week. 17.1 (buy) _______ a new television. 18. My mother (watch) _______Don’t burn several times. 19. I (watch) _______Iron man last night. 20. My father (meet) _______my teacher before. 21. My brother (meet) _______his old friends yesterday. 22. He (go) _______to Paris last summer. 23. She (never, go) _______to Paris. 24. Phong (finish) _______his homework recently. 25. My friend (finish) _______his essay three days ago. IV. Complete the following conversation with the sentences A - E. Phong: (26)___________________________________________ Mai: Yes. I have. I am a member of Sunflower club. Phong: (27) ___________________________________________ Mai: We are helping disadvantaged or handicapped children. Phong: (28) ___________________________________________ Mai: We are playing games with them, cooking meals and teaching them to paint. Phong: (29) ___________________________________________ Mai: For me, the most challenging thing is finding a way to fit into the children. Phong: (30) ___________________________________________ Mai: Yes. I like helping children. A. What are you doing? B. Do you enjoy the work? C. What kind of volunteer work are you taking part in? D. Hi, Mai! Have you ever done volunteer work? E. What is the most challenging thing about doing the volunteer work?