单项选择题

More than 13,000 McDonald's restaurants in America will use a new kind of cooking oil to ______.

A．lower the costs of the products
B．make its food taste better than ever before
C．cure the heart disease
D．do good to the health of consumers
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单项选择题
Which of the following is true according to the passage
A．If a person's cholesterol is high, it won't affect his health.
B．Heart disease is connected with the contents of cholesterol.
C．The Americans pay no attention to the action of McDonald's.
D．Most of American foods are lower in trans-fatty acids.
单项选择题
The underlined word switching in Paragraph 5 probably means ______.
A．losing
B．spending
C．changing
D．studying
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