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1、Unit 4 Astronomy the science of the stars .单句语法填空1It is obvious _what_ the local government can do to protect the environment for future generations.解析：句意：为了子孙后代，当地政府在保护环境方面所能做的事情是显而易见的。It为形式主语，_ the local government can do to protect the environment for future generations是真正的主语，该主语从句缺少宾语，且表示物，故填wha
2、t。2New technologies have made _it_ possible to turn out new products faster and at a lower cost.解析：考查it作形式宾语。3All possible means _have_been_taken_(take) to prevent the river _being_polluted_ (pollute)解析：考查主谓一致和非谓语动词。4If they win the final tonight, the team are going to tour around the city _to_be_ch
3、eered_(cheer) by their enthusiastic supporters.解析：考查非谓语动词。5The meeting was held in a lively atmosphere _where_ everybody felt to share his ideas.解析：考查定语从句。从句中缺少地点状语，故填where。6During those four years, he worked day and night, thus _improving_(improve) his theory gradually until it was complete.解析：考查vi
4、ng形式作结果状语。7Those reports included one case, _where/in_which_ a fire broke out and destroyed two cars，although there were no injuries.解析：考查非限制性定语从句。8I suppose by the time I come back in ten years time all these old houses will _have_been_pulled_ (pull) down.解析：考查时态和语态。9Sometimes he found _it_very har
5、d to fall asleep at night, so he went to see the doctor.解析：考查it作形式宾语。10Susan made _it_ clear to me that she wished to make a new life for herself.解析：本题考查代词的运用。句意：苏珊清楚地跟我表明她希望为自己创造新的生活。分析句子结构可以看出，该句中包含一个that引导的从句，而且根据语境可知，that从句的内容就是苏珊向我表明的事情，所以后置的that从句实际上是made的真正宾语，故用形式宾语it指代that从句。11The manager wa
6、nts to see changes in the company, and I am sure he will _in_ time.解析：句意：经理想要看到公司的改变，我确信他迟早会看到的。in time“及时；最后，迟早”，符合题意。12It remains to be seen _whether_ the newly formed committees policy can be put into practice.解析：本题考查名词性从句。句意：那仍然得看新形成的委员会政策能否付诸实践。It在此为形式主语，故seen后为真正的主语从句，又由remains to be seen可知存在不
7、确定的意思，所以用whether是否。13The top leaders of the two countries are holding talks in a _friendly_(friend) atmosphere.解析：句意：两国高层领导人在友好的氛围(atmosphere)中进行谈判。14Thank God youre safe!I stepped back, just in time _to_avoid_(avoid) the racing car.解析：答语句意：我退后了一步，正好避开了奔跑的汽车。in time to do sth.“正赶上做某事”。15Its said tha
8、t the power plant is now twice _as_ large as what it was.解析：本题考查倍数的表达法。句意：据说这个发电厂现在是过去的两倍大。“倍数as.as”是倍数的表达法，意为“是的几倍”，其中as.as之间要用原级。.完成句子根据语境和汉语提示完成下列英语句子。1An exceptionally big fire _broke_out_(爆发) at midnight.Luckily, firefighters arrived just _in_time_(及时) for the rescue.2Atmosphere _blocks_out_(挡住
9、) a large amount of harmful light from space.3_Now_that_(既然) we have finished the design, the company, _in_its_turn_(轮到), will do the construction.4_On_a_global_scale_(在全球范围内), AIDS may well become the leading cause of infant death.5He, as well as his sister, _was_brought_up_(被抚养) in the mountainous
10、 area where education facilities are far from satisfactory.6建议采取措施来阻止工厂排放有害气体。_It_is_suggested_that_measures should be taken to prevent factories from discharging harmful gases into the air.7地球变暖是否加剧取决于我们的活动是否产生更多的二氧化碳。Whether the global warming will become more serious _depends_on_whether_ our acti
11、vities will produce more carbon dioxide.8大部分证据被毁了，不可能证明这种食物是有毒的了。Most of the evidence is destroyed, _which_makes_it_impossible_to prove that the food is poisonous.9证人的描述太难以置信，没有任何实际价值。The witnesss descriptions were _too_ unbelievable _to_ be of any real value.10没有什么比得上一句诚心的问候更令人愉快了。There is nothing
12、_more_pleasant_than_ a cheerful word of greeting.单句改错1She has got into the bad habit of reading in the bed, which is harmful for her eyes._forto_2All theories come from practice and in return serve practice._returnturn_3The twin brothers stood under the tree, puzzling and saying nothing._puzzlingpuz
13、zled_4The sun heats the earth, which makes possible for plants to grow._makes后加it_5The new stadium being built for the next Asian Games will be three times as larger as the present one._largerlarge_6Youll succeed on time because you are always working hard._onin_.教材原句1_What_is even more important is
14、 that_as_the earth cooled down, water began to appear on its surface.解析：第一空考查主语从句，从句中缺少主语，故填what；第二空考查状语从句，结合语意可知此处表示“伴随”。2According to a widely_accepted_(accept) theory, the universe began with a “Big Bang”_that/which_threw matter in all directions.解析：第一空考查非谓语动词作定语修饰theory，且accept与theory之间为被动关系，故填a
15、ccepted；第二空考查定语从句，从句中缺少主语且指物，故填that/which。3It was not immediately obvious_that_water was to be fundamental_to_the development of life.解析：第一空考查主语从句，it为形式主语，that引导的从句是真正的主语；第二空考查固定短语，be fundamental to 意为“是的基础”。4As a result_of_this, many scientists believe the earth may become too hot _to_live_(live) on.解析：第一空考查固定短语；第二空考查“too.to.”结构。5_Whether_life will continue on the earth for millions of years to come will depend on whether this problem can be solved.解析：考查主语从句。从句中不缺主语和宾语，结合语意可知答案是whethe
