单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．Pain-relievers have little harm.
B．Pain-relievers can be addictive.
C．Heroin and morphine are addictive.
D．Not all people who try to get pain-relievers have an ach
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单项选择题
The passage mainly tells us about ______.
A．the importance of predicting earthquakes
B．a new method to predict earthquakes
C．the great damages caused by earthquakes
D．a traditional method to predict earthquakes
填空题
Conflict
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