2019英语专八模拟试卷及答案（二）

　　PART III LANGUAGE USAGE [15 MIN]

　　The passage contains TEN errors. Each indicated line contains a maximum of ONE error. In each case, only ONE word is involved. You should proof-read the passage and correct it in the following way:

　　For a wrong word, underline the wrong word and write the correct one in the blank provided at the end of the line.

　　For a missing word, mark the position of the missing word with a “∧” sign and write the word you believe to be missing in the blank provided at the end of the line.

　　For an unnecessary word, cross the unnecessary word with a slash “/” and put the word in the blank provided at the end of the line.

　　Proofread the given passage on ANSWER SHEET THREE as instructed.

　　Most people would describe water like a colorless liquid. They __1__

　　would know that in very cold conditions it becomes a solid called
　　ice and that when heating on a fire it becomes a vapor called steam. __2__

　　However, water, they would say, is a liquid. We have learned that
　　water consists of molecules composed with two atoms of hydrogen __3__

　　and one atom of oxygen, which we describe by the formula H2O.
　　This is equally true of the solid called ice and the gas called steam.

　　Chemically there is no difference between the gas, the liquid, and
　　the solid, all of which is made up of molecules with the formula H2O. __4__

　　This is true of other chemical substances; most of them can exist as
　　gases or as liquids or as solids. We may normally think of iron as a
　　solid, but if we will heat it in a furnace, it will melt and become a __5__

　　liquid, and at very high temperatures it will become a gas. Nothing
　　very permanent occurs when a gas changes into a liquid or a solid.

　　Everyone knows that ice, which has been made by freezing water,
　　can be melted again by warmed and that steam can be condensed __6__

　　on a cold surface to become liquid water. In fact, it is only because
　　water is so a familiar substance that different names are used for __7__

　　the solid, liquid and gas. Most substances are only familiar with __8__

　　us in one state, because the temperatures requiring to turn them __9__

　　into gases are very high, or the temperatures necessary to turn them
　　into solids are so low. Water is an exception in this respect, which
　　is another reason why its three states have given three different names. __10__

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