单项选择题

Having two eyes, instead of one, is particularly useful for ______.

A．seeing at night
B．seeing objects far away
C．looking over a wide area
D．judging distances
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单项选择题
The plane succeeded in carrying the boy on board with ______ in the air.
A．one wheel
B．two wheels
C．three wheels
D．four wheels
单项选择题
What is the topic of this paragraph
A．Mountain Climbing.
B．Helicopter.
C．A School Master and His Students.
D．A Rescue Task.
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