单项选择题

The result of the rearch for an easily digestible fat turned out to be ______.

A．commercially useless
B．just as anticipated
C．somewhat controversial
D．quite unexpected
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单项选择题
we learn from the passage that olestra is a substance that ______.
A．contains plenty of nutrients
B．renders foods calorie -free while retaining their vitamins
C．makes foods easily digestible
D．makes foods fat -free while keeping them delicious
单项选择题
What is a possible negative effect of olestra according to some critics
A．It may impair the digestive system.
B．It may affect the overall fat intake.
C．It may increase the risk of dancer.
D．It may spoil the consumers' appetite.
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