以下是新概念英语第一册4—14课的课后练习题及参考答案
1. Lesson 4：
- 练习内容：根据例句进行句型转换，将所给物品改为“这不是我的……这是你的……”的句式。
- 参考答案：
1. No. It isn't my pen. It's your pen.
2. No. It isn't my pencil. It's your pencil.
3. No. It isn't my book. It's your book.
4. No. It isn't my watch. It's your watch.
5. No. It isn't my coat. It's your coat.
6. No. It isn't my dress. It's your dress.
7. No. It isn't my skirt. It's your skirt.
8. No. It isn't my shirt. It's your shirt.
9. No. It isn't my car. It's your car.
10. No. It isn't my house. It's your house.
2. Lesson 6：
- 练习内容（A 部分）：根据所给信息完成句子，描述人物的国籍以及所属物品的国籍特征。
- 参考答案：
- Alice is a student. She isn't German. She is French. This is her car. It is a French car.
- Hans is a student. He isn't French. He is German. This is his car. It is a German car.
- 练习内容（B 部分）：根据所给信息进行选择疑问句的练习，询问人物或物品的所属国籍。
- 参考答案：
1. Is she a German student or a Japanese student? She is a German student. (She isn't a Japanese student.)
2. Is this a German car or a French car? It isn't a German car. It's a French car.
3. Is he an Italian student or a German student? He isn't an Italian student. He's a German student.
4. Is she an Italian student or a Chinese student? She isn't an Italian student. She is a Chinese student.
5. Is this an American car or an English car? It isn't an American car. It's an English car.
6. Is he a Japanese student or a Korean student? He isn't a Japanese student. He's a Korean student.
7. Is this an English car or an Italian car? It isn't an English car. It's an Italian car.
8. Is he an English student or a Chinese student? He isn't an English student. He's a Chinese student.
9. Is this a French car or a German car? It isn't a French car. It's a German car.
10. Is this a Chinese car or a Japanese car? It isn't a Chinese car. It's a Japanese car.
11. Is this an English car or an American car? It isn't an English car. It's an American car.
12. Is this a Japanese car or a Korean car? It isn't a Japanese car. It's a Korean car.
3. Lesson 8：
- 练习内容（A 部分）：根据所给信息完成句子，描述人物的身份和国籍。
- 参考答案：
1. My name is Robert. I am a student. I am Italian.
2. Sophie is not Italian. She is French.
3. Mr. Blake is my teacher. He is not French.
- 练习内容（B 部分）：根据所给职业信息进行一般疑问句的练习，并作出肯定回答。
- 参考答案：
1. What's his job? Is he a policeman? Yes, he is.
2. What's her job? Is she a policewoman? Yes, she is.
3. What's his job? Is he a taxi driver? Yes, he is.
4. What's her job? Is she an air hostess? Yes, she is.
5. What's his job? Is he a postman? Yes, he is.
6. What's her job? Is she a nurse? Yes, she is.
7. What's his job? Is he a mechanic? Yes, he is.
8. What's his job? Is he a hairdresser? Yes, he is.
9. What's her job? Is she a housewife? Yes, she is.
10. What's his job? Is he a milkman? Yes, he is.
4. Lesson 10：
- 练习内容（A 部分）：根据例句进行句型转换，将肯定句改为否定句，并将描述的事物特征进行反向表述。
- 参考答案：
1. Mr. Blake isn't a student. He's a teacher.
2. This isn't my umbrella. It's your umbrella.
3. Sophie isn't a teacher. She's a keyboard operator.
4. Steven isn't cold. He's hot.
5. Naoko isn't Chinese. She's Japanese.
6. This isn't a German car. It's a Swedish car.
- 练习内容（B 部分）：根据所给信息进行描述人物或事物特征的练习。
- 参考答案：
1. Look at that man. He's very fat.
2. Look at that woman. She's very thin.
3. Look at that policeman. He's very tall.
4. Look at that policewoman. She's very short.
5. Look at that mechanic. He's very dirty.
6. Look at that nurse. She's very clean.
7. Look at Steven. He's very hot.
8. Look at Emma. She's very cold.
9. Look at that milkman. He's very old.
10. Look at that air hostess. She's very young.
11. Look at that hairdresser. He's very busy.
12. Look at that housewife. She's very lazy.
5. Lesson 12：
- 练习内容（A 部分）：根据所给信息完成句子，指出物品所属。
- 参考答案：
1. Stella is here. That is her car.
2. Excuse me, Steven. Is this your umbrella?
3. I am an air hostess. My name is Britt.
4. Paul is here, too. That is his coat.
- 练习内容（B 部分）：根据所给信息回答问题，指出物品所属者。
- 参考答案：
1. Whose is this handbag? It's Stella's. It's her handbag.
2. Whose is this car? It's Paul's. It's his car.
3. Whose is this coat? It's Sophie's. It's her coat.
4. Whose is this umbrella? It's Steven's. It's his umbrella.
5. Whose is this pen? It's my daughter's. It's her pen.
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