单项选择题

A．She had to go home.
B．She was too tired to continue.
C．She had to finish her schoolwork.
D．She was thirsty.
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单项选择题
According to the passage, most industries in the near past focused on ______.
A．the demands of the market
B．the efficiency of production
C．the preferences of consumers
D．the satisfaction of consumers
单项选择题
A．Tourists.B．Birds.C．Winds.D．Some animals.
A．Tourists.
B．Birds.
C．Winds.
D．Some animals.
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