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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There was an ______ of discontent on her face.
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B．sight
C．shock
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I have some difficulties ______ these words, would you mind ______ me your dictionary
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B．to understand, to lend
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