单项选择题


Directions: In this section, you will hear3 short passages. At the end of each passage , you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
Passage One
Questions 26 to 28 are based on the passage you have just heard.

A.Because it is the largest airport in America.
B.Because it has a good sorting system.
C.Because it has a favorable location.
D.Because it is the most important city for business in America.