【单选题】

Questions 8 to 10 are based on the following conversation.At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation.

All of the following are true about theAmerican teachersEXCEPT that they______。A．are informal in class
B．try their best to create a relaxed atmosphere
C．care little about punctuality
D．are very easy-going and considerate