单项选择题

A．When hunting for food.
B．When sleeping.
C．When being attacked.
D．When communicating with their cousins.
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单项选择题
A．Her car is being repaired.B．She wants to help reduce pollution.C．Parking is difficult in the city.D．The cost of fuel has increased.
A．Her car is being repaired.
B．She wants to help reduce pollution.
C．Parking is difficult in the city.
D．The cost of fuel has increased.
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