单项选择题

A．We will not have enough food to eat.
B．All the oil that drives our cars will be used up.
C．The earth will become too crowded.
D．There will be little water left on Earth.
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单项选择题
A．Their behavior should be attributed to factors beyond their control.B．Their behavior should be attributed to internal factors.C．Their behavior should be attributed to external factors.D．Their behavior should be attributed to others.
A．Their behavior should be attributed to factors beyond their control.
B．Their behavior should be attributed to internal factors.
C．Their behavior should be attributed to external factors.
D．Their behavior should be attributed to others.
单项选择题
A．They narrowly escaped crashing into each other.B．One plane climbed above the other at the critical moment.C．They bumped into each other over a swimming pool.D．They avoided each other by turning in different directions.
A．They narrowly escaped crashing into each other.
B．One plane climbed above the other at the critical moment.
C．They bumped into each other over a swimming pool.
D．They avoided each other by turning in different directions.
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