单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A) About children’s health. C) About money.
B) About social manners. D) About old people’s health.
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单项选择题
Which of the following is an opinion
A．Zoo keepers had problems in getting animals to leave their cages.
B．Training is cruel to animals.
C．Animals obey commands if they are trained to do so.
D．Many animals can be trained, on commands, to remain still.
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