单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．One.
B．Three.
C．Two.
D．Four.
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The Chinese government has set up______where development and plant and animal exploitations are forbidden.
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There are several factors responsible for the dramatic decrease in the Giant Panda’s population: poaching,______, the panda’s low reproductive rate and bamboo flowering.
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