单项选择题

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
It can be inferred that

A．all correctly printed stamps are worthless.
B．Mauritius needed the stamps to send out invitations to a ball.
C．the printer was punished for his mistake.
D．collectors are constantly looking for stamps with mistakes.

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单项选择题

What does George think about the long waiting

A．He thinks it terrific.
B．He thinks the waiting is worthy.
C．He feels comfortable waiting so long.
D．He feels disgusted.

单项选择题

Who is Mordechai Feingold

A．The president of the University of Cambridge.
B．The chairman of Science and the Making of Modern Culture.
C．A faithful follower of Newton.
D．A professor at the California Institute of Technology.

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. It can be inferred that 您的浏览器不支持 audio 元素。

Questions 15 to 17 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
It can be inferred that