听一段材料，回答下面几个小题。What's the probable relationship between the two speakers?
A. Husband and wife.
B. Teacher and student.
C. Mother and son.What does the man do?
A. He is a writer.
B. He is a student.
C. He is a chemist.What will they probably do soon?
A. Set up a lab.
B. Write papers.
C. Work on experiments.
听一段材料，回答下面几个小题。Why is the mother leaving?
A.Because there is going to be a flood.
B.Because she is going to help the flooded people.
C.Because she is going to look after the patients in the hospital.What is the family like?
A.The family is full of care and love.
B.The boy’s father is too busy to ask for a leave.
C.The mother never cares for her son.Who will pick the boy up after school when his mother leaves?
A.His father.
B.His grandfather.
C.No one.
听一段材料，回答下面几个小题。What does the woman prefer?
A.A cheap hotel.
B.A modern hotel.
C.An expensive hotel.Where is the hotel the woman prefers?
A.Next to a bank.
B.Opposite to a supermarket.
C.Next to a restaurant.Where does the conversation most probably take place?
A.Near a bank.
B.Near a hotel.
C.In a restaurant.
What does the woman mean?
A.She doesn’t like singing.
B.She has just downloaded some new songs from the Internet.
C.She can’t sing any songs.
Where does the dialogue take place?
A.In a bookshop.
B.In a library.
C.In the reading room.
How is the man going to Pittsburgh?
A.By taxi.
B.By train.
C.By subway.