单项选择题

Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．The police.
B．A bee-keeper.
C．A beeper.
D．The poor motorist.
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单项选择题
A．Wars or natural disasters make them lose their families.B．They want to help their families earn enough money to survive.C．They are poor.D．All the above.
A．Wars or natural disasters make them lose their families.
B．They want to help their families earn enough money to survive.
C．They are poor.
D．All the above.
填空题
Why can astronomers age galaxies by computing how much the wavelength of their light has stretched
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