The main point of the passage is ______.A．the idle

单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions.
Now, listen to the passage.

The main point of the passage is ______.

A．the idle and empty life of the Americans
B．the great functions of American movies
C．why American people go to the cinema
D．the popularity of Hollywood movies