单项选择题

Questions 19-22 are based on the following dialogue:
According to the professor, why is the buffalo population increasing

A．More buffalo are surviving the winter.
B．Fewer buffalo are dying of disease.
C．More buffalo are being born.
D．Fewer buffalo are being killed by hunters.

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单项选择题

What does the woman mean

A．The man should have offered his assistance earlier.
B．She doesn’t need the man’s help.
C．She didn’t realize the boxes were empty.
D．She wants the man to move the boxes.

单项选择题

A．forB．atC．inD．since

A．for
B．at
C．in
D．since

Questions 19-22 are based on the following dialogue: According to the professor, why is the buffalo population increasing 您的浏览器不支持 audio 元素。

Questions 19-22 are based on the following dialogue:
According to the professor, why is the buffalo population increasing