阅读短文，选择正确答案。
The bell rings (响). Mr. Wang goes into Class Three and wants to give an English lesson. At this time Mr. Zhang comes and asks him to attend (参加) an important (重要的) meeting. So Mr. Wang says to his students, "Study by yourselves, please."
When Mr. Wang comes back,he sees Zhao Yang talking with his desk mate Li Cheng.
“Stand up, Zhao Yang," says Mr. Wang, "What are you doing?"
"I'm reading English," says ZhaoYang.
"What's in your hand?" says Mr.Wang.
ZhaoYang looks at his hand. It's a history book.Then he looks at Li Cheng. There is an English book in his hand. So he says, “Sorry, Mr. Wang. We are studying the history of England."
