Great scientists
a. clear out b. dry up c. clear up d. leave off
13. _____the lecture , a discussion was held .
a. follow b. followed c. following d. to follow
14. he was struggling to earn his ____in industry .
a. life b. living c. stay d .staying
15. at that time people recorded events by ___words on stones.
a. to cave b. carved c. carving d. carves
iii 完成句子
1. 因?yàn)樘鞖獠缓茫覀兺七t了運(yùn)動會。
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2. 課堂上老師永遠(yuǎn)不會被電腦取代。
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3. 我們必須找到解決問題的關(guān)鍵。
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4. 這里的農(nóng)民靠賣蔬菜為生。
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5. 第29屆奧運(yùn)會將于XX年在北京舉行。
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iv 閱讀理解
americans often say that there are only two things a person cannot be sure of in life, death and taxes. many people feel that the us has the worst taxes in the world.
taxes are the money that people pay to support their government. there are generally three levels of government in the us.federal, state, and city； therefore, there are three types of taxes.
salaried people who earn more than four to five thousand per year must pay a certain part of their salaries to the federal government. the percentage varies for different people. it depends on the salaries. the federal government has a two-level income tax； that is, 15 or 28 percent, $ 17, 850 is the cut off. the tax rate is 15 percent below $ 17,850 and 28 percent above.
the second tax is for the state government.new york, california, or any of the other forty-eight states. some states have an income tax similar to that of the federal government. of course, the percentage for the state tax is lower. other states have a sales tax, which is a percentage charged to any item which people buy in the state. some states use income tax to raise their revenues(稅收).
the third tax is for the city. the tax comes in two forms.property tax (residents who own a home have to pay taxes on it) and excise tax, which is collected on vehicles in a city. the cities use this money for education, police, public works, etc.
since americans pay such high taxes, they often feel that they are working one day each week just to pay their taxes. people always complain about taxes. they often say that the government misuses their tax dollars. they all believe that taxes are too high in this country.