听力原文：M: Welcome! What can I do for you？
W: I'd like a bottle of Coca Cola and some cakes.
M: OK. Here you are.
Q: Where are they？
（19)
A．In a food store.
B．In the post office.
C．In the police office.

According to the professor, what two factors led to the similarity of goods available nationwide？ Click on two answers.
A．The mass production of goods
B．The wide distribution of catalogs
C．The growing interest in regional styles
D．The desire to copy designer fashions

听力原文：Can the boy swim？
（14)
A．No, he can't.
B．Yes, he can't.
C．No, he can.

According to the professor, how did children acquire their culture throughout most of history？
A．By experiencing life in another country
B．By watching cultural programs on television
C．By going to the museum and the library
D．By listening to parents and grandparents

What can be inferred about a lake with brown water？
A．The lake is not safe for swimming.
B．The lake has a sandy bottom.
C．The water contains suspended particles.
D．The water is very deep in the center of the lake.

Listen again to part of the lecture. Then answer the question. Why does the professor say this:
A．To stress the mysterious nature of severe immune responses
B．To argue that anaphylaxis is mainly the result of bad luck
C．To point out that scientists disagree over what causes allergies
D．To suggest that people are crazy to eat offending substances