单项选择题

Mr. Brown"s condition looks very serious and it is doubtful if he will______.

A．pull back
B．pull up
C．pull through
D．pull out
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单项选择题
Since the early nineties, the trend in most businesses has been toward on-demand, always-available products and services that suit the customer s______rather than the company s.
A．benefit
B．availability
C．suitability
D．convenience
单项选择题
The majority of nurses are women, but in the higher ranks of the medical profession women are in a______.
A．minority
B．scarcity
C．rarity
D．minimum
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