I,Viết lại câu: What books are students reading? What books ...........................................? II. Read the passage and answer the following questions. (1p) About twenty percent(%) of the world’s present energy already comes from the sun in one form or another. Special devices have already been made available to put on the roofs of houses and flats to catch the sun’s rays and thus heat water. Thousands of these devices (thiết bị) are now being used to provide energy in through the United States while more than a million solar water- heating units have already been built in homes in Japan. Other purpose for which solar energy is at present being used include the separation of salt from the sea water, irrigation and sewage disposal. For most people in developing countries, the need is not for air conditioners or central heating but for cheap ways of cooking food, drying crops and lighting homes. 1. How much percent of the energy comes from the sun?  About twenty percent of the world’s present energy comes from the sun. 2. Do special devices put on the roofs of houses to catch solar energy? Yes, these devices do. / Yes, they do. 3. What are now being used to provide energy in the United States? ........................................................................................................................... 4. Have solar water- heating units been built in homes in Japan? ........................................................................................................................... 5. Do you think solar energy should be used in our country? Why? ...........................................................................................................................