单项选择题

What will happen to the plane under the "tank test"

A．It will be broken.
B．It will be made stronger.
C．It will be filled with water.
D．It will be tested by pilots.
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单项选择题
What might be the most suitable title for the text
A．Two Important Tests on Airplanes.
B．The Importance of Flying Safely.
C．The Danger of Testing Airplanes.
D．How Airplanes Are Made and Tested.
单项选择题
The text is mainly about ______.
A．rapid changes in earth's temperature
B．bad effects of global warming
C．moving of a country to a new place
D．reasons for lowland flooding
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