单项选择题

The Alsatian’s olfactory cells are （）times as many as man’s.

A．forty-four
B．one million
C．220 million
D．10,000

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The old man was very strange because（）

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B．people didn’t like him and were afraid of him
C．he liked to walk in the woods without roads
D．he didn’t do anything as the others did
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Which of the following is NOT a possible reason for whales dying（）

A．Pneumonia.
B．Brain infection.
C．Over-population.
D．Over-eatin
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