单项选择题

The （） choice for a consumer, therefore, is the choice among the available ones that will enable him or her to maximize utility.

A．optimal
B．optional
C．optical
D．optimistic

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单项选择题
The first Olympiad is said to have consisted （） of a 200-yard foot race near the small city of Olympia.

A．nearly
B．completely
C．merely
D．identically
单项选择题
Today's popular clothing chains （） teenagers, who can be counted upon to change their tastes every 30 days.

A．resort to
B．attend to
C．appeal m
D．apply to
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