IX. Choose the correct sentence among (A, B, C or D) that uses the words given. 81. Keep/ environment/ clean / very important. A. Keeping environment is clean and very important. B. Keeping environment clean is very important. C. Keeping the environment clean is very important. D. Keeping the environment clean is important. 82. The town/ far/ than /we thought. A.The town is farer than we thought. B. The town is farther than we thought. C. The town is farthest than we thought. D. The town is far than we thought. 83. We / better / eat / too / fatty food / because / it / not good / our health. A.We had better eat too many fatty food because it is not good for our health. B. We had better not eat too many fatty food because it is not good for our health. C. We had better eat too much fatty food because it is not good for our health. D. We had better not eat too much fatty food because it is not good for our health. 84. My friend/enjoy/visit/art gallery/I/too. A. My friend enjoy visiting art gallery and I am, too. B. My friend enjoys visiting art gallery and I am, too. C. My friend enjoys visiting art gallery and I do, too. D. My friend enjoys to visit art gallery and I do, too. 85. I/ find/play/ soccer/ useful / because/ /I/ can/improve/ health. A. I find playing soccer useful because I can improve our health. B. I find playing soccer is useful because I can improve our health. C. I find playing soccer useful because I can improve my health. D. I find playing soccer is useful because I can improve my health. 86. This camera/ not/ expensive/ as/I /thought first. A. This camera is not as expensive as I thought first. B. This camera is not expensive as I thought first. C. This camera is not as expensive than I thought first. D. This camera is as expensive as I thought first. 87. Big Heart organization / encouraged / people / protect / environment/ so far. A. Big Heart organization encouraged people to protect the environment so far. B. Big Heart organization has encouraged people to protect the environment so far. C. Big Heart organization encourages people to protect the environment so far. D. Big Heart organization has encouraged people protect the environment so far. 88. My brother/ not like/ ice-skate/ because/ think/ it/ dangerous. A. My brother does not like ice-skating because he think it is dangerous. B. My brother does not like ice-skating because he thinks it is dangerous. C. My brother does not like ice-skate because he think it is dangerous. D. My brother does not like ice-skating because he think it dangerous. 89. We/ already/ ask/ people/ donate/ books / clothes / children. A.We have already asked people to donate books and clothes for children. B. We have already asked people to donate books and clothes to children. C. We have already askes people to donate books and clothes for children. D. We have already asked people donate books and clothes for children. 90. I / continue / my hobby / future / because / it / help/ save / environment. A. I will continue my hobby in the future because it helps save the environment. B. I will continue my hobby in future because it helps save the environment. C. I will continue my hobby in the future because it help save the environment. D. I will continue my hobby in future because it help save the environment.