单项选择题

A．To show that air travel is far safer than driving a car.
B．To show the great responsibility shouldered by the pilots.
C．To give an example of air disasters.
D．To show the key role played by air traffic controllers.
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单项选择题
A．They will tell Jennifer to practice volleyball harder.B．They will tell Jennifer not to fall behind others in volleyball.C．They will tel1 Jennifer not to fall behind others in study.D．They will tell Jennifer about her grades.
A．They will tell Jennifer to practice volleyball harder.
B．They will tell Jennifer not to fall behind others in volleyball.
C．They will tel1 Jennifer not to fall behind others in study.
D．They will tell Jennifer about her grades.
单项选择题
A．Venus is too hot.B．There is no water there.C．There is no oil.D．It is lacking in carbon dioxide.
A．Venus is too hot.
B．There is no water there.
C．There is no oil.
D．It is lacking in carbon dioxide.
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