单项选择题

A．Crowded air traffic.
B．The large size of airplanes.
C．Mistakes by air traffic controllers.
D．Bad weather.
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单项选择题
A．The newcomer.B．The officer.C．The bus driver.D．The people in line.
A．The newcomer.
B．The officer.
C．The bus driver.
D．The people in line.
单项选择题
A．He likes the current temperature.B．He wishes the weather would get hotter.C．He cooked a bit of the food.D．He knows he will like the food.
A．He likes the current temperature.
B．He wishes the weather would get hotter.
C．He cooked a bit of the food.
D．He knows he will like the food.
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