单项选择题


In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
Questions 11 to 13 are based on the following passage. At the end of the passage, you will be give 15 seconds to answer the questions. Now, listen to the passage.
Which color does Americans often use to express heat

A.Pink.
B.Red.
C.Blue.
D.Black.