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单项选择题

People probably take part in dangerous sports nowadays because ______.

A．they have a lot of free time
B．they can go to hospital if they are injured
C．their lives lack excitement
D．they no longer need to hunt for food
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单项选择题The writer of the passage has a (an) ______ attitude towards dangerous sports.

A．positive
B．negative
C．objective
D．subjective

单项选择题More and more people today ______.

A．are trying activities such as bungee jumping
B．are climbing the highest mountains
C．are close to death in sports
D．are looking for adventures such as exploring unknown places