单项选择题

Questions 23 to 26 are based on the conversation you have just heard.

（）

A．Eliminate poverty and injustice.
B．Migrate to other planets.
C．Control the environment.
D．Find inexhaustible resources.

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单项选择题
A．The man shouldn’t hesitate to take the course.B．The man should talk with the professor first.C．The course isn’t open to undergraduates.D．The course will require a lot of reading.
A．The man shouldn’t hesitate to take the course.
B．The man should talk with the professor first.
C．The course isn’t open to undergraduates.
D．The course will require a lot of reading.
单项选择题
According to the author, New York City （）

A．ranks high in road accidents
B．is much safe than before
C．ranks low in child mortality rates
D．is less dangerous than small cities
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