今天我们要完成一篇有关Sun Wei和David Smith的小练习，适合小学二年级学生使用。看看我们会了解到有关他们的什么内容呢？看完后记得答题，然后看注解，最后看笔记整理。

Hello! My name is Sun Wei. Here is an American boy. His name is David Smith. He is twelve. And I am twelve, too. David is in Class Three, Grade One. I am in Class Three, Grade One, too. He is Number Eight, Row Five. I am Number Five, Row Four.

（ ）1.David___an American boy.
A. is B. am C. are

（ ）2.He is___ .
A. ten B. eleven C. twelve

（ ）3.Sun Wei is___ Class Three, Grade One.
A. in B. on C. of

（ ）4.David is in Row___ .
A. Four B. Five C. One

（ ）5.Sun Wei is Number___ .
A. Four B. Five D. Eight

解析：
1.A.第三人称单数后be动词用is
2.C.从短文第五句He is twelve.可以得出答案
3.A.在几班，在几年级用介词in
4.B.从短文倒数第二句He is Number Eight, Row Five.可以得出答案
5.B.从短文最后一句I am Number Five, Row Four.可以得出答案

笔记整理：
1.介绍自己姓名可以用句型My name is ...
2.介绍自己年龄可以用句型I"m eleven/ten.
3.介绍自己所在班级和年级可以用句型I"m in Class XXX, Grade XXX.
4.介绍自己学号，座位时可以用句型I am Number XXX, Row XXX.

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