必修3 Unit 4 课下作业（一~三）
课下作业（一） 考点过关针对练
Ⅰ.单词拼写
1．Accustomed to the climate (气候) in the countryside, the old couple prefer not to move to the city.
2．They completely ignored these problems as if they never existed (存在)．exo最新消息
3．We are so far from the earth that we can't feel its pull (牵引力)．
4．He was quite puzzled (困惑的) about what to do next, so he turned to his father for help.
5．The old scientist told his students that scientific theories (理论) must be based on facts.
6．He found something floating (漂浮) on the lake, which frightened him.
7．A truck went out of control and crashed (碰撞) into the back of a bus.
8．I could feel the wind gently (温和地) blowing through my hair and it was a warm summer breeze.
9．Newton was one of the greatest physicists (物理学家) in the world and many people admire him very much.
10．Unlike (与……不同) most people in the office who come to work by car, I usually come to work by bus.
1．The ❶existence (exist) of terrorism lets the world not be stable.Terrorists' activities, many of which are linked to ❷religious (religion) extremism (极端主义), have resulted in a global disaster.They not only bring threat to the safety of human
s, but have a ❸harmful (harm) effect on economic growth.Many people are forced to flee their homes because of growing fears of ❹violence (violent)．All governments are paying great attention to this issue, but to stop terrorism is indeed a systematic project, which requires effort, wisdom and cooperation.
2．A conflict ❶broke (break) out when the villagers tried to prevent the factory ❷from sending waste water into their fields.The villagers had been watching out ❸for the waste water for some time.They found it was very harmful ❹to their health as well as their crops.Officials came just in time ❺to_stop (stop) the situation getting worse.
3．The development of science makes it possible for us ❶to_visit (visit) the moon.But you will find ❷it difficult to stay there.The earth is 49 times ❸the size of the moon.As a result, the gravity of the earth is about six times as great as ❹that of the moon.When we get closer to the moon, we will feel its gravity pulling us, but it is not as strong ❺a pull as the earth's.
Ⅲ.语境改错
1．文中共有6处错误，每句中最多有两处，请出并改正。
It is reported that we have had three times as much fires as last year.Last Saturday, a big fire break out in a department store in Guangming Road.There were such many people and cars in the street that firefighters couldn't get through, which made it difficult for the fire trucks get close to the scene.Depending on their rich experience, the firemen prevented the fire spread eventually.It is obvious that whether we can stop fire disasters depends on whether we have a sense of safe.
答案：第一句：much→many
第二句：break→broke
第三句：such→so; 第二个get前加to
第四句：spread→spreading
第五句：safe→safety
2．文中共有4处错误，每句中最多有一处，请出并改正。
Whether there is life on Mars is still puzzle to us.The earth is six times big than Mars.There is almost no oxygen on Mars and this makes impossible for life to exist.If we are to go to Mars one day, we should have to take along our own oxygen, food, clothing or shelter.
答案：第一句：puzzle前加a
第二句：big→bigger
第三句：impossible前加it
第四句：or→and
Obviously, it is the teamwork that_makes_it_possible_for_them_to_go anywhere they want to.
2．既然我们谁也不知道她的电话号码，只有派人去把消息告诉她了。(now that)
Now_that_none_of_us_knows_her_telephone_number,_we will have to send someone to deliver the message.
3．李明的手机看起来和张华的一样，但价格是他的两倍。(倍数表达法)
Li Ming's mobile phone looked just the same as Zhang Hua's, but it cost twice_as_much_as his.
4．这些游客们回到宾馆，又累又困。(形容词短语作状语)
These travelers returned to the hotel, tired_and_sleepy.
5．当这个教授出现时，所有的学生欢呼起来。(cheer)
When the professor turned up, all_the_students_cheered_up.
6．我的父母一天天的变老，该轮到我开始照顾他们的时候了。(turn)
My parents are getting older and older, so it_is_my_turn_to_start looking after them.
课下作业（二） 话题阅读培优练
Ⅰ.根据提示填空
With the development of modern science and technology, we have ❶made_it_possible_to_explore_space (使探索太空成为可能)．While an increasing number of citizens claim that this kind of launch is ❷a_waste_of_time_and_money (浪费时间和金钱) because they hold the view that it can not bring any benefits for them.However, ❸I_hold_the_different_opinions (我持不同的意见)．
❹There_is_no_doubt_that (毫无疑问) space exploration will spend much money.However, ❺in_the_long_run (从长远看), it is a long investment and will be ❻beneficial (benefit) to us in the future.To begin with, space ❼exploration (explore) will bring benefits for us to search for natural resource.That is to say, other planets may be rich in ❽various (variety) resources that are in great shortage on the earth.It is reported that Mars ❾contains (contain) a great deal of natural gas and iron.Moreover, engineers have also noticed that these resources on the planet are able to explore and can ❿be_used (use) in the earth if they could solve the problem of transportation.
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