单项选择题

It is implied but not stated that Quickwheel ______.

A．can't be used in place of a tire over long distance
B．will be available chiefly in the U. S.
C．can be folded and unfolded
D．functions well over various kinds of road surfaces

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单项选择题

In the first paragraph, disabled motorists means ______.

A．motorists who can't walk
B．motorists whose cars are broken
C．drivers whose tire goes flat
D．drivers who are hurt in an accident

单项选择题

The purpose of the article is ______.

A．to tell readers how to use Quickwheel
B．to tell readers that spare tires are no longer necessary
C．to show how well a new product can meet consumers' needs
D．to recommend a new product Quickwheel