Unit 4 Astronomy: the science of the stars【学习目标】：掌握重点词组和特殊句型的用法【学习重点】：黑体单词和词组【学习难点】：总结重点词组【自主学习】短语互译1消失，经过 2及时，总有一天 3阻止，制止 4依靠，信赖 5感到高兴 6既然，由于 7一般而言 8突发，爆发 9与不同 10冷却 根据中文提示，填写所缺单词的适当形式。1. We have established socialist （制度）. 2. He doesnt believe in （宗教）. 3. It is so in (理论), but not in practice. 4. The struggle became more and more (激烈的). 5. Fresh air is (基础的, 基本的) to good health. 6. Fruit juices can be (有害的）to childrens teeth. 7. Water consists of hydrogen and (氧气). 8. Salt （存在） mostly in sea water. 9. The stone rolled down the hill by (引力). 10. A （生物学家） is mainly studying biology. 用短语的正确形填空cool down， now that， depend on， break out， block out， in time， watch out for，as if prevent.from1The war between the two countries.2 wild animals when you go up the hills.3You ought to write you know the address.4You must bear in mind that your parents hope to you to become a good doctor.5We put a curtain across the window to the sunlight.6It took Charles a long time to after the heated argument.7.Lacey has a back injury that may _ him _ playing in the tomorrows game.8.Jane shouted in surprise _ she had seen a large sum of money.单项选择1 Doctors always tell us that drinking too much_our health，but some people dont care.Ais harm toBdoes harmful to Cis harmful toDdo harm to2_youve got a chance，you should make full use of it.ANow thatBAfter CAlthoughDAs soon as3-My goodness! I failed again in the computer test. -_. The world is not at an end. A. Look up B. Pick up C. Cheer up D. Keep up 4 you like it or not, youll have to give up smoking.A. If B. Whether C. How D. Why5 The young dancers looked so charming in their beautiful clothes that we took pictures of them. A. many of B. masses of C. the number of D. a large amount of6 How the big forest fire has remains to be a mystery. A. taken place B. turned up C. broken out D. broken up7 We must do whatever we can to the river being polluted any more. A. separate B. keep C. prevent D. guard8 Freezingwinterisharmfulorangetrees.A.forB.toC.ofD.at9.Shestartedasanofficejunior,andbecamethedirectorofthewholecompany.A.insurpriseB.inreturnC.inturnD.intime重点短语 1