1、Unit 4 Astronomy the science of the stars一、用所给短语的适当形式填空prevent . from, watch out for, now that, in time, break out, cheer up1He climbed the mountain carefully, all the time _loose rocks.2Doctors say many diseases can be _spreading by hand washing.3_the kids have left home, we have got a lot of extra
2、 space.4She started as an office junior, and _became the director of the whole company.5After a fire _in the lab, a lot of equipment was damaged.6Whenever I encounter difficulties, she will encourage me and help me _ .答案：1、watching out for 2、prevented from 3、Now that 4、in time 5、broke out 6、cheer up
3、二、单句语法填空It merely exists _the illusions of those talkers.As is known to us, the Peoples Republic of China came into _(exist) as an independent country in 1949.The service is available to all _(exist) customers.Their reason for doing it is still _puzzle to me.The police are still puzzling _how the ac
4、cident could have happened.Her _(puzzle) look on her face suggested she didnt understand what I said.答案：inexistenceexisting aabout/overpuzzled三、完成句子The boss employed ten workers to _the old house.老板雇用了十个工人拆除那座旧房子。Her family wondered if she could _after the operation.她的家人想知道她是否能够在术后恢复健康。The policeman
5、 _the driver and asked to see his licence.警察让那个司机停下来，要求看他的驾驶执照。As the proverb goes, “Where there is a will, there is a way.” Our efforts will pay off _ .常言道，“有志者，事竟成”，我们的努力迟早会有所回报。Youd better do one thing _ , so that you can concentrate on it.你最好一次做一件事，这样你就能集中注意力。_did anyone involved speak to the pr
6、ess.任何相关人员都没有向媒体发表过言论。Well be able to finish repairing your car _ .我们将很快就能把你的车修好。答案：pull downpull throughpulled up in timeat a timeAt no timein no time四、语法填空No one _1_(know) exactly how the earth began. According to a _2_(wide) accepted theory, the universe began with a “Big Bang”， _3_exploded loudl
7、y and produced water vapour and many _4_(gas) making the earths atmosphere. As the earth cooled down, water appeared and stayed _5_the surface. It was the presence of water that allowed the earth to dissolve harmful gases and acids into the oceans and seas, which made _6_possible for life to develop
8、. First, the appearance of small plants encouraged the later development of early shellfish and all sorts of fish. Next, green plants began to grow on land, _7_(follow) by land animals. So reptiles appeared for the first time. Later, dinosaurs developed. However, they suddenly disappeared. After tha
9、t, mammals came into being. Finally, humans _8_(appear) and spread all over the earth. However, they are putting too much carbon dioxide into the atmosphere, _9_(make) the earth too hot to live on. So, _10_life will continue on the earth for millions of years to come will depend on whether this prob
10、lem can be solved.1_ 2._ 3._ 4._ 5._ 6._ 7._ 8._ 9._ 10._ 答案：1.knows2.widely3.which4.gases5.on 6.it7.followed8.appeared9.making10.whether五、短文改错After I elected chairman of the students union of our school, I decided to start a school English newspaper for us student. Together with five schoolmates wi
11、th excellently English, I tried to cover up what was going on in our school. Beside, we took some wonderful pictures about our school life. When the first issue of the newspaper came out, it was very popular with the students. So far, I had been working as the chief editor for half a year, which hel
12、ps myself a lot with my leadership skills. In my opinion, start a school newspaper can be fun, but it is an huge responsibility as well. I am really proud of that Ive done.答案：第一句：elected前加was; studentstudents第二句：excellentlyexcellent; 去掉up第三句：BesideBesides第五句：hadhave; myselfme第六句：startstarting; ana第七句：thatwhat