新概念英语第二册21课？新概念英语(New Concept English),是英国路易·亚历山大(Louis G.Alexander)1967年专为非本族的中学和成年学习者编写的一套英语课本。那么，新概念英语第二册21课？一起来了解一下吧。
Lesson 21
1. c
根据课文第3-4行Last year, however, it came into use, 只有c. came into use recently 比较接近课文的实际内容，而其他3个选择都不符课文内容。
2. d
根据课文第8行…but I am determined to stay here, 只有d. has refused to leave his house 与课文内容相符，其他3个选择都与事实不符。
3. c
只有选c. can hear 才能使这个句子同前一句Passing planes can be heard night and day 的含义相同，只是语态不同。 而其他3个选择a. can heard, b. can to hear, d. can be heard 都不符合语法，在意思上都讲不通。
4. d
只有d. possible 才能使句子同前一句It couldn't be used then 意思最接近。a. able （能）需要人作主语，本句的主语是it 形式主语;b. allowed（允许）不符合题目的意思， c. impossible（不可能的）与句子意思相反。
Lesson 21
Mad or not?
是不是疯了
First listen and then answer the question.
听录音，然后回答以下问题。
Why do people think the writer is mad?
Aeroplanes are slowly driving me mad. I live near an airport and passing planes can be heard night and day. The airport was built years ago, but for some reason it could not be used then. Last year, however, it came into use. Over a hundred people must have been driven away from their homes by the noise. I am one of the few people left. Sometimes I think this house will be knocked down by a passing plane. I have been offered a large sum of money to go away, but I am determined to stay here. Everybody says I must be mad and they are probably right.
New words and expressions 生词和短语
madadj.发疯
reasonn. 原因
sumn. 量
determinedadj. 坚定的，下决心的
参考译文
飞机正在逐渐把我逼疯。
Lesson 21
1. c
根据课文第3-4行Last year, however, it came into use, 只有c. came into use recently 比较接近课文的实际内容，而其他3个选择都不符课文内容。
2. d
根据课文第8行…but I am determined to stay here, 只有d. has refused to leave his house 与课文内容相符，其他3个选择都与事实不符。
3. c
只有选c. can hear 才能使这个句子同前一句Passing planes can be heard night and day 的含义相同，只是语态不同。 而其他3个选择a. can heard, b. can to hear, d. can be heard 都不符合语法，在意思上都讲不通。
4. d
只有d. possible 才能使句子同前一句It couldn't be used then 意思最接近。a. able （能）需要人作主语，本句的主语是it 形式主语;b. allowed（允许）不符合题目的意思， c. impossible（不可能的）与句子意思相反。
Lesson 21 Mad or not?
课文内容：
Aeroplanes are slowly driving me mad. I live near an airport and passing planes can be heard night and day. The airport was built years ago, but for some reason it could not be used then. Last year, however, it came into use. Over a hundred people must have been driven away from their homes by the noise. I am one of the few people left. Sometimes I think this house will be knocked down by a passing plane. I have been offered a large sum of money to go away, but I am determined to stay here. Everybody says I must be mad and they are probably right.
精讲笔记：
7.Sometimes I think this house will be knocked down by a passing plane.
有时候我觉得我的房子会被一架飞过的飞机撞倒，
语言点1 此句的核心语法点是将来时的被动语态，结构为：will be done (+by...)
语言点2 比较学习home和house:
home家（具有感情色彩）：East or west, home is the best.金窝银窝不如自己的狗窝。
新概念英语第2册课文详注Lesson28
1.Jasper White is one of those rare people who believes in ancient myths. 贾斯珀·怀特是少有的相信古代神话的人之一。
在第21课的课文详注中，我们曾经提到“one of +名词/代词”这个结构，of后面的名词必须是复数，但与这个结构连用的动词必须是单数：
One of your friends is waiting for you now.
你的一位朋友正在等你。
课文中who代指的是one of those rare people，所以动词用believes。
2.… but ever since he moved in, he has had trouble with cars and their owners.………但自从搬进去后，就和汽车及车主们发生了摩擦。
ever since的语气比since强，表示“从那以后一直，主句一般用完成时：
I've been interested in flying ever since I was a boy.
自从我的孩提时代起，我就对飞行一直感兴趣。
以上就是新概念英语第二册21课的全部内容，4.Over a hundred people must have been driven away from their homes by the noise. 有一百多人肯定是被噪音逼得已经弃家远去。情态动词 must +be表示根据事实所作的推论，这在第1册第127课已经讲过。
