课时作业(二十一)Unit 1Great scientists.用所给词的适当形式填空1.We will have a further discussion before we draw a final_(conclude)2.The prime minister is making an important_(announce) at the moment.3.Because of the severe_(pollute)，the water in the river is too dirty to drink.4.The student_(absorb) in taking down data.5.The belief that the world is flat is not_(science)6.Edison_a lot to the development of the world.I admire his great_.(contribute)7.He tried to_forward，but he could hardly make any_.(move)8.He was_about making predictions for the success of the program，so we responded_to his decision.(cautious)9.Many buildings are under_(construct) over there.10.She_(private) told the secret to me and I promised to keep it.答案：1.conclusion2.announcement3.pollution4.is absorbed5.scientific6.contributed; contribution7.move; movement8.cautious; cautiously9.construction10.privately.完成句子1.Professor Wang said the reason for shortsightedness is complicated and there is still_(没有治疗方法)2.Keeping prices from going up too sharply is_(对中国是一个挑战)as well as the whole world.3.Water can_(吸收和放出大量热量)without big changes in temperature，thus creating a stable environment.4.The army was welltrained and wellarmed，and had little difficulty_(打败敌人)5._(暴露在阳光下很长时间)will do harm to your skin.6.According to the drivers explanation，it was not his carelessness but the bad road conditions that_(负责任)the accident.7.Our carelessness_(导致) some cases in recent days.8.Apart from this，we also_(提出) several suggestions.答案：1.no cure for it2.a challenge to China3.absorb and give off a lot of heat4.defeating the enemy5.Being exposed to sunlight for too much time6.were to blame for7.contributed to8.put forward.阅读理解(2015贵州高三联合考试)Apart from psychological illness，we are all largely responsible for our own emotional health.What we say to ourselves over and over for days，weeks，months，and sometimes years，has a great effect on how we see ourselves.This also contributes to many mental health disorders.Many of us have problems with negative thoughts playing on the channel of our minds，but if youre buried in them and believe them，they could be wearing your sense of selfesteem (自尊)Here are a few beliefs that indicate you may need to switch the channel：Im not good enough？/I dont deserve.？/No one likes me？/Im a failure？Negative thoughts remind you of your bad feelings and they bring your focus on your failures，and they get you nowhere.What can you do？Here are some suggestions：Switch the channel when negative thoughts appear.Selftalk is not so obvious that we often dont notice its effect on our mood and belief systems.Key things to notice are“if only”or“what if”statements：the former keeps you stuck in the past with regret，while the latter keeps you fearful of the future.There is nothing you can do about the past，and the future isnt here yet，so stay in the present moment.Recognize that actions always follow beliefs.Youll find yourself behaving in ways that are consistent to your beliefs.So，start believing the best about yourself：act as if you believe that youre a valuable and worthy person.Develop positive selftalk rather than negative selftalk.Instead of always looking down upon yourself in your head，think of some things you actually like about yourself.What are your strengths？What are you good at？Instead of saying“Im a loser”，try saying，“I am capable./Im good at./I accept myself the way I am.”Thinking poorly about ourselves gets us nowhere and is extremely selflimiting.Decide today to turn off the negative selftalk channel in your mind and develop your true potential.语篇导读：文章主要告诉大家抛弃消极的思想，培养积极的思想。1.From the first two paragraphs we can learn that_.Alots of people have no sense of selfesteemBfocusing on negative thoughts may have bad effect on peopleCnegative thoughts will strengthen our sense of selfesteemDfew people have negative thoughts and mental problems答案：B解析：推理判断题。根据文章第一段中的“What we say to ourselves.has a great effect on how we see ourselves.This also contributes to many mental health disorders.”以及第二段中的“Many of us have problems with negative thoughts playing on the channel of our minds”可以判断出，消极的思想会对人产生不利的影响，故答案为B。2.The underlined word“wearing”in Paragraph 2 is closest in meaning to“_”Astrengthening BprotectingCweakening Dreplacing答案：C解析：词义猜测题。根据画线词前后的内容可知，这里指的是消极的思想可能会减弱人们的自尊感。故wearing在此与weakening的意思最接近，表示“减弱”。3.What do the suggestions in the text tell us？AOur beliefs always come after actions.BPositive selftalk does good to our mental health.CLooking down upon ourselves is a sign of modesty.D“What if”keeps you stuck in the past with regret.答案：B解析：推理判断题。根据文章最后四段的内容可推知，积极的自