单项选择题

Questions 17—20 are based on the following passage. You now have 20 seconds to read Questions 17—20.
What should you do if your child show signs of poisoning

A．Call your doctor.
B．Call your neighbors.
C．Wait in 12 hours.
D．Call the police.

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单项选择题

单项选择题

Questions 17—20 are based on the following passage. You now have 20 seconds to read Questions 17—20. What should you do if your child show signs of poisoning 您的浏览器不支持 audio 元素。