单项选择题

According to the author, if the marshes are destroyed,______.

A．the snow geese will be in danger
B．the agriculture of the area will suffer
C．the Canada geese will replace the snow geese
D．the snow geese may move to breed in Minnesota
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单项选择题
According to the passage, for which of the following reasons are the late seventeenth and early eighteenth-century Chinese records important
A．They contradict the theory of the Maunder minimum.
B．They suggest that the Maunder minimum cannot be related to climate.
C．They verify the existence of a span of unusual cold worldwide during the Maunder minimum.
D．They show that the European observations are of dubious statistical significanc
单项选择题
The author seems to imply that ______.
A．humans are responsible for the problem
B．hunting limits and regulations should be lifted
C．the birds have a strong capability to survive
D．the Canada geese are a better species than the snow geese
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