听一段材料，回答下面几个小题。
What’s the relationship between the woman and the man?
A.Teacher and student.
B.Mother and son.
C.Classmates.
Why didn’t the man come to the class last night?
A.He came back late and his friend was tired.
B.He had given it up.
C.He had been writing reports all day long.
What can we know about the man?
A.He is interested in learning foreign languages.
B.He can communicate with his friends in English.
C.He had studied the language before he came.