单项选择题

Although accidents do happen, skiers will be reasonably safe if ______.

A．they stay on the officially approved slopes
B．they ski only for pleasure
C．they ski only at resorts
D．they choose less crowded ski slopes
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单项选择题
In areas where avalanches are known to happen ______.
A．local residents stay indoors when the weather is bad
B．measures are taken to prevent serious avalanches
C．small avalanches can easily be prevented
D．skiers form themselves into a wall to keep the snow in position
单项选择题
According to the writer, skiing conditions in the Salzburg area of Austria before the accident happened were ______.
A．perfect for the inexperienced skier
B．unsafe because the new snow was covered with ice
C．typical of conditions resulting in avalanches
D．suitable only for skiing locally
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