单项选择题

A small number of firms have stopped trading.

A. hotels
B. shops
C. restaurants
D. companies
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If headaches only occur at night, lack of fresh air is often the cause.
A. deliver
B. fall
C. happen
D. arrive
单项选择题
The policeman wrote down all the particulars of the accident.
A. secrets
B. details
C. benefits
D. words
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