单项选择题

Questions 26 to 27 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
How many meetings are mentioned in the news

A．1.
B．2.
C．3.
D．4.
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单项选择题
What is the finding of scientists
A．Plants can save water.
B．Photosynthesis is complex.
C．High carbon dioxide is not good to crops.
D．The new way of food engineering raises production.
单项选择题
Which of the following are NOT mentioned in putting out the fire
A．People.
B．Dogs.
C．Vehicles.
D．Airplanes.
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