高中英语 Unit 21《Human Biology》总复习课件北师大版选修7_高考复习指南

高中英语 Unit 21《Human Biology》总复习课件北师大版选修7

　　B．Hadn’t it been C．Was it not

　　D．Were it not 解析：　句意为：要不是因为在上学的路上被汽车撞了且腿部骨折，她可能就通过考试了。根据句意及主句谓语动词形式可知从句是与过去事实相反的虚拟语气，故答案为A。答案：　A 8．After the bell rings，which indicates the ending of the exam，you________stay where you are until all your papers are collected. A．shall

　　B．would C．will

　　D．can 解析：　句意为：当标志着考试结束的铃响后，你们必须等试卷全部被收起来后。答案：　A 练规范、练技能、练速度练规范、练技能、练速度 ①Fortune numbers are chosen at random on the computer. 幸运号码是在电脑上随意选出来的。 ②My phone seems to switch itself off randomly. 我的手机好像随时自动关机。 ③He was not listening and made a random answer to the teacher’s question.他没有在听讲，对教师的问题瞎答一通。 10.完成句子 He________________________________(随意地打开一本书) and started reading. 答案：　opened a book randomly 11．It is not a good habit to state your opinion________and you’d better think it over before you act. A．at all

　　B．full of faith C．at once

　　D．at random 解析：　从“you’d better think it over before you act”看出要“三思而后行”。空白处应该填入at random，前半句“随便发表你的观点不是一种好习惯”，与后半句相吻合。答案：　D at all costs不管多大代价，无论如何回归课本P34：The Olympic spirit—the spirit of competition which emphasises taking part rather than winning—has been violated by the desire to succeed at all costs. 人们不惜任何代价来获胜的愿望违背了重在参与而不是获胜的奥林匹克精神。 ①We must arrive there at all costs before midnight. 我们无论如何要在午夜前到达那里。 ②The new building’s going up at a cost of $82 million. 修建这座大楼要花费8,200万美元。 ③He bought a satisfactory house at the cost of all his money. 他用所有的积蓄买了一个合他心意的房子。 ④Careless driving costs him his life. 漫不经心的开车使他丧失生命。 12.完成句子 (1)He is determined to win____________________(无论如何)． (2)The young policeman saved the little girl from the fire，but________________________(以自己的生命为代价)．答案：　(1)at any cost　(2)at the cost of his own life wipe out彻底毁灭，消除；擦净……的内部；结束回归课本P38：Epidemics can wipe out up to half of the population in urban areas. 流行病可以消灭居住在城市的多达一半的人口。 ①The storm wiped the building out only in two hours. 在两个小时之内，暴风雨把那座建筑物毁坏了。 ②She stood up to wipe the sweat off her face. 她站起来擦擦脸上的汗珠。 ③He wiped away the grease from the windshield of the car. 他擦去了汽车挡风玻璃上的油渍。 13.完成句子 (1)趁着还没有人滑倒，你最好把地板上的牛奶擦干净。 You’d better________________________on the floor before someone slips in it. (2)医生们正在寻找消灭癌症的医疗方法。 Doctors are searching for a cure that will________________________. 答案：　(1)wipe up the milk　(2)wipe out cancer at any rate无论如何，至少回归课本P137：If trends continue the way they’re going，then in my opinion，yes—in developed countries at any rate. 在我看来，如果照目前的趋势发展下去，会是这样的——至少在发达国家是这样。 ①At any rate，I determined to wait for his definite reply. 无论如何，我决心等他给我一个肯定的答复。 ②Well，that’s one good piece of news at any rate. 不管怎么说，这是个好消息。 ③If you go on at that rate，you will injure your health. 那样下去的话，你会把身体搞垮的。 ④The apples are sold at the rate of ￡10 for twenty. 这些苹果以每20个10英镑的价格出售。 14.________，he would make special mention of it in the report，for he has given us many hints about it in advance. A．At any rate