单项选择题

Passage Two
Questions 29 to 32 are bused on the passage you have just heard.

A．Cancers caused by infections are more common.
B．They can hardly be prevented.
C．There will a seventeen percent increase rate in cancers.
D．They result from smoking.
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单项选择题
There are many possible ways to explain why walking inspires clarity and creativity EXCEPT that ______.
A．it is believed that we’re designed to thrive outside
B．high ceilings and the sky prompt unrestrained thinking
C．walking simply makes for better brain functioning
D．it will make people fight over one "wells" of attention
单项选择题
A．statesB．affirmsC．infersD．speculates
A．states
B．affirms
C．infers
D．speculates
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