单项选择题

A．taking further photos
B．taking soil samples
C．planting vegetation in the soil
D．taking samples of vegetation
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单项选择题
A．longest defended borderB．longest undefended borderC．longest undefined borderD．longest coastal border
A．longest defended border
B．longest undefended border
C．longest undefined border
D．longest coastal border
单项选择题
A．at least eighty-one people have been killed by floodingB．a dangerous goods warehouse has been damaged by fireC．many killed were unable to leave the buildingD．the fire in a handicraft factory in southern China is striking
A．at least eighty-one people have been killed by flooding
B．a dangerous goods warehouse has been damaged by fire
C．many killed were unable to leave the building
D．the fire in a handicraft factory in southern China is striking
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