问题描述：
( )the help of the teacher,the boy could read some books( )the ago of five.A.Of;at B.With;at
( )the help of the teacher,the boy could read some books( )the ago of five.
A.Of;at B.With;at C.Under;in D.With;in
( )the help of the teacher,the boy could read some books( )the ago of five.
A.Of;at B.With;at C.Under;in D.With;in
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