Directions:In this section,you will hear 3 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 the Answer Sheet with a single line through the centre.
Passage One
Questions 11 to 13 are based on the passage you have just heard.
11.How often are most rubber trees tapped for the latex?
A.Every day.
B.Every other day.
C.Twice a month.
D.Twice a year.
12.When is the rubber tree not tapped?
A.When it is between five and six years old.
B.When it is a few inches tall.
C.When it has some disease.
D.When it changes its leaves.
13.How many pounds of rubber does a young tree usually produce in a year?
A.Three pounds.
B.Ten pounds.
C.Twenty pounds.
D.Twenty-five pounds.
Passage Two
Questions 14 to 16 are based on the passage you have just heard.
14.What is the first American college degree?
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