单项选择题

It can be inferred that even though the mailsters were small, uncomfortable, and dangerous, they could______.

A．eliminate the need for relays
B．carry handcarts and pouches as well
C．be more protection than an umbrella
D．reduce wear on shoes
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单项选择题
According to the passage, mailsters were likely to tip over because______.
A．even large dogs could cause this to happen
B．they had 3 wheels
C．the mail could shift in the van when cornering over 25 mph
D．of cars lined up behind them
单项选择题
What does the passage mainly discuss
A．The prevention of illness through exercise and nutrition.
B．The German and Christian influences on nutrition and physical fitness.
C．Development of the physical fitness movement.
D．The nutrition and physical fitness movements.
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