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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热门试题

单项选择题

The author is inclined to think that a fifth level

A．would be little better than the fourth level
B．may be a lot more satisfying level than the first four
C．can be the last and most satisfying level
D．will become attainable provided the government takes actions

单项选择题

It can be inferred from the passage that by the end of World War Ⅱmost Americans______.

A．were very rich
B．live in poverty
C．had the good things on the first three levels
D．did not own automobiles