单项选择题

Winter nights are seldom pitch-black in the Far North because of ______.

A．the moon and stars
B．the northern lights
C．snow on the ground
D．all of the above mentioned factors
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单项选择题
In midwinter there is no sun shining in the Far North because ______.
A．the Far North is too far away from the sun
B．the sun is not seen again for six months
C．the sun never set in midsummer
D．people see the sun setting straight south of them
单项选择题
From the passage, we can infer all except that ______.
A．Eskimos are more likely to eat wolves in summer
B．Eskimo women are responsible for housework
C．animal meat is Eskimos' main source of food
D．hunting is an important part of Eskimo life
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