单项选择题

A．It increases the cost of car production.
B．Carmakers are not sure if it is useful.
C．The research on it is still being carried out.
D．People still have their doubts.
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encouragement
单项选择题
A．Finding something that everyone thinks suits her best.B．The suggestions of other people.C．The price of the clothes.D．The attitude of the salesman.
A．Finding something that everyone thinks suits her best.
B．The suggestions of other people.
C．The price of the clothes.
D．The attitude of the salesman.
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