单项选择题

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

A．On a plane.
B．On a bus.
C．On a train.
D．In a taxi.
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单项选择题
Recently, some people are interested in natural foods because ______.
A．these foods are fresh and sweet
B．they want to change their eating habits
C．these foods do not contain chemical additives and have not been affected by chemical fertilizers
D．they don't like the processed foods
单项选择题
In the battery farm the chickens are fed on food which ______.
A．is good in quality
B．is bad in quality
C．is a natural food
D．is a kind of rubbish
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