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yellow—colored milk． 参考答案： 5，9，4，8，2，1，10，7，3，6 5，9，4，8，2，1，10，7，3，6----------------------------------------1、Choose the best topic sentence from the group below．Write the letter of the choice in the blank． A.Computers have brought great changes in our daily life．B.Computers make our daily life better and better．C.Computers become an integral of our daily life．D.Computers are widely used in our daily life． 参考答案： B Computers make our daily life better and better．----------------------------------------2、Read the following paragraph and underline the topic sentence．The three types of solar equipment used SO far are the furnace，the still，and the cell．Solar furnaces heat water or airs providing a heat supply for a building．Some solar furnaces can produce temperatures as high as about 4，149 degrees Centigrade，which means that they can be used in industry．In many places electricity is in short supply．Solar stills can provide fresh water fairly cheaply．They can rapidly take the salt out of seawater．one very simple type of still can also get small amounts of water from the earth—even a desert．Solar cell is the most useful type of solar power equipment．Some apartment housed use solar power for heating in winter．Solar cells can be made small enough to carry and large enough to produce enough power tO run a car．The lives of solar cells are long． 参考答案： The three types of solar equipment used so far are the furnace，the still，and the cell． The three types of solar equipment used so far are the furnace，the still，and the cell．----------------------------------------3、Read the following paragraph carefully and select the best topic sentence from the four possible answers that follow the paragraph．Topic Sentence：There has long
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