单项选择题

36（）

A．down
B．up
C．off
D．out

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单项选择题
What's the meaning of the word elastic (Line 2, Para 2)
A．Adaptable.
B．Flexible.
C．Pliable.
D．Yielding.
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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