单项选择题

There are more complaints about_____ than others.

A．clothing
B．electrical appliances
C．travel agencies
D．photographic equipment
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单项选择题
In general, about_____ of complaints cannot be investigated.
A．10 per cent
B．20 per cent
C．25 per cent
D．30 per cent
单项选择题
Which of the following is the closest to the record number of consumer complaints
A．2,000.
B．4,000.
C．5,000.
D．7,000.
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