Unit4一、根据句意填入单词或短语的正确形式1. The professor has brought in a good （系统）of teaching language from abroad.2. There are many t about the origin of life.3. Children should not be allowed to watch v movies.4. I believe the affair is h to the company.5. The old lady e only on coffee and bread.6. She listened with a p expression on her face.7. The moons p on the sea causes the waves. 8. I had intended to catch the early train, but I didnt get up (及时)9. Why do you want to kill the hens that （下蛋）every day?10. Many women plan to g babies this year.11. Doctors say many diseases can be p spreading by washing our hands.12. I stayed up last night, so today I cant c .13. N you have grown up, you should not depend on your parents.14. Do you know when the Second World War b ?15. W for the cars when you cross the street.二、Unit4 词汇串记Our geography teacher says the earth is only one of the planets of the giant . other planets, life on the earth, but lifes origin is still a . Different and cultures have separate ideas. The teacher says it may be divided into four stages.The first stage is about how the universe began. A widely accepted can explain it. After the “Big Bang” , began to form and combine to create stars and other bodies. The second stage is how the earth formed. Between 4.5 and 3.8 years ago, clouds and dust in space settled into a solid . The earth became that it often exploded. The and water appeared. Water is a matter for life to exist on the earth. It also dissolves gases and acids. The third stage is about plants and animals appearance. At first, plants in the water appeared and . They produced , which encourages animals in the water to exist. Later, green plants on the land caused animals on the land to appear. They first and became babies. Later, mammals babies directly. The last stage is that humans became the most important animals on the earth. We put too much carbon dioxide in the to cause global warming. We must how things will go and make laws to the earth becoming too hot. we have taken measures, we will succeed . So lets and work together. 三、单项选择1. In a room above the store, where a party , some workers were busily setting the table.A. was to be held B. has been held C. will be held D. is being held2. It we had stayed together for a couple of weeks I found we had a lot in common.A. was until; when B. was until; thatC. wasnt until; when D. wasnt until; that3. well go camping tomorrow depends on the weather.A. If B. Whether C. That D. Where4. The top leaders of the two countries are holding talks in a friendly .A. state B. situation C. atmosphere D. air5. As the busiest woman in Norton, she made her duty to look after all the other peoples affairs in that town.A. this B. that C. one D. it6. -How long are you staying? -I dont know. .A. Thats OK B. Never mind C. It depends D. It doesnt matter7. It was raining heavily. Little Mary felt cold, so she stood to her mother.A. close B. closely C. closed D. closing8. Will you be home to see the children before they go to bed?A. on time B. in time C. at a time D. at one time9. The festival has been a great success, last year when it rained nonstop.A. like B. alike C. unlike D. dislike10. Measures have been taken to prevent the river from .A. having polluted B. being polluting C. being polluted D. to polluted11. What are the differences between the American and Britain of government.A. systems B. religions C. barbers D. theories12. It is generally accepted that smoking is to our health.A. harmless B. harmful C. harm D. harmfully13. Try and a bit; life isnt that bad!A. cheer up B. come up C. look up D. put up14. he said at the meeting surprised everybody present.A. That B. Which C. What D. How15. Please these warning signs.A. take out B. bring out C. come out D. watch out参考答案：一、system; theories; violent; harmful; existed; puzzled; gravity; in time; lays eggs; give birth to; prevented from; cheer up; Now that; broke out;Watch out二、solar systems; Unlike; exists; puzzle; religions; theory; broke out; Atoms; billion; existed; globe; violent; oxygen; fundamental; harmful; multiplied; oxygen; laid eggs; gave birth to; atmosphere; watch out; prevent from; Now that; in time; cheer up三、ADBCD CABCC ABABD