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 on the unmarked ski slopes
D．they choose less crowded ski slopes

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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

单项选择题

Winter holiday makers in the mountains come face to face with death because______.

A．they fail to realize how dangerous avalanches can be
B．they are not expert enough at skiing on the fixed runs
C．they are trying to avoid areas where avalanches happen
D．they ski great distances down the mountainsides