Chuyển động của các hạt phấn hoa trong thí nghiệm của Brao-nơ chứng tỏ A: hạt phấn hoa hút và đẩy các phân tử nướ B: các phân tử nước hút và đẩy hạt phấn hoa. C: các phân tử nước lúc thì đứng yên, lúc thì chuyển động. D: các phân tử nước không đứng yên mà chuyển động không ngừng.

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III. Give the correct form of words 1. English is an ………………………………….... and important subject. (interest) 2. Ba is a famous stamp ………………………………….... ( collect) 3. They learn to play a ………………..……………….. instrument. ( music) 4. Mr. Tan works …………………..………. hours than my father. (many) 5. He drinks……………………..……wine than Mr. Hai. (little) 6. He has a large …………………..……………of foreign stamps. (collect) 7. These shoes are …………………………..………….than those shoes. (expensive) 8. He accepts her ……………………..………………… right away. ( invite) 9. Mr. Jones repairs machines in a factory. He’s a ……………………………….. ( machine) 10. Talking is the most common way of ………………………………….. (relax). 11. The pictures are very ……………………………….……………(color) 12 He is very ………………………………..………(interest) in that movie. IV: Supply the correct form of the verbs in brakets to complete sentences. 1. She often (go) ............................................................. to the market with her mother every weekend. 2. We (visit) ...................... Hue next month. 3. My younger sister (collect) ...................................................... dolls two years ago. 4. .................. you ever (do) ................................................... volunteer work ? V: Write full sentences using the suggested words and phrases given. 1. My brother / find / play / table tennis / interesting / because / he / can / play / best friends. = 2. I / be / Ho Chi Minh City / so far. = 3. Lan / like / talk / to / her friends / her free time =