A: Hello, Zhang. How can I_______ （联系）you?B: You can friend me on WeChat.A: OK. May I have your WeChat ID, please?B: Sure, scan my QR code here on the phone.

A. an American guest at a Chinese host family
B. an expert in English at a university
C. a librarian from the department library

A. In the morning.
B. In the afternoon.
C. In the evening.

A. His name is Mark Wolf.
B. He is 54 years old.
C. His nationality is American.