his mother’s help the little boy can call her 13635322770A. With onB. With atC. With

问题补充：

his mother’s help , the little boy can call her 13635322770

A. With , on

B. With, at

C. With , about

D. At, with

答案：

A. With , on

(答案→)B. With, at

C. With , about

D. At, with

解析：with带有, 伴随;on在上面;at在一点;about关于. 句意:在他的母亲的帮助下, 这个小男孩能打她的号码13635322770了. 结合语境可知前文表示伴随状况, 下文电话号码前用介词at, 表示数字上的一点, 故选B.