单项选择题

Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．Fifty underground stations were made waterproof.
B．A flood wall was built.
C．An alarm system was set up.
D．Rescue teams were formed.
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单项选择题
A．What chemicals tears are composed of.B．Whether crying really helps us feel better.C．Why some people tend to cry more often than others.D．How tears help people cope with emotional problems.
A．What chemicals tears are composed of.
B．Whether crying really helps us feel better.
C．Why some people tend to cry more often than others.
D．How tears help people cope with emotional problems.
单项选择题
A．It limited their supply of food.B．It made their eggshells to fragile.C．It destroyed many of their nests.D．It killed man baby bald eagles.
A．It limited their supply of food.
B．It made their eggshells to fragile.
C．It destroyed many of their nests.
D．It killed man baby bald eagles.
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