单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. The speed of light.
B. The speed of telecommunications.
C. Astronauts landing on the moon.
D. The United States.
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单项选择题
A. No, it’s open only to teachers and postgraduates.B. Yes, but he needs the approval of his professor.C. Yes, because he is a senior student.D. Yes, he can study there if he is writing a research paper.
A. No, it’s open only to teachers and postgraduates.
B. Yes, but he needs the approval of his professor.
C. Yes, because he is a senior student.
D. Yes, he can study there if he is writing a research paper.
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