Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.

What is encouraged in American culture according to the passage

What does the professor mean by saying "something like ...

单项选择题What does the professor mean by saying "something like that" at the end

How long does it take if they go to the library by busA...

单项选择题How long does it take if they go to the library by bus

Which compound noun form is NOT mentioned in this conve...

单项选择题Which compound noun form is NOT mentioned in this conversation