单项选择题

Ants help the starling to （）

A．keep clean
B．find food
C．build its nest
D．keep its feather dry

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单项选择题
This passage deals mostly with（）

A．how birds lay eggs
B．how birds keep clean
C．birds that like water
D．birds that eat bugs
单项选择题
The writer thinks that birds bathing in a lake or puddle are（）

A．nervous
B．preening
C．having a good time
D．very clean
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