单项选择题

Questions 7 to 10 are based on the following conversation. Which of the following is INCORRECT about the mobile according to the conversation

A. It is made of pieces of aluminum.
B. It can move slowly in the air.
C. It was originally made of steel.
D. It is not safe because of its weight.
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单项选择题
Cola became a carbonated drink
A. by sheer accident.
B. by careful studying.
C. by complicated experiments.
D. by the clerk’s careless work.
单项选择题
According to Linda, a gift
A. should be decorative.
B. should be impressive.
C. should never be used.
D. should have useful functions.
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