My teacher is an American. He is tall, blond haired and blue eyed. He speaks a little Chinese. As I was up late last night, working overtime, I was unable to attend his class today.

My teacher

My teacher


My teacher is an American man, he is tall, blond hair and blue eyes. He can speak a little Chinese. Because I work overtime last night, I didn't go in his class.

My teacher is an American man. He is tall with blond hair and blue eyes. He can speak a little Chinese.
I didn't go to his class last night because I had to work overtime.

 

My teacher is an American. He is tall, and has blond hair and blue eyes. He can speak a little Chinese. Because I worked overtime last night, I didn't go to his class.

it is always: go to (a) class, not go in a class. 

My teacher

My teacher


My teacher is an American man.  He is tall and has blond hair and blue eyes. He can speak a little Chinese. Because I worked overtime last night, I didn't go in his class.

Sorry that you had to work overtime. 

My teacher

My teacher


My teacher is an American man, he is tall, with blond hair and blue eyes. He can speak a little Chinese. Because I work overtime last night, I didn't go in his class.