Ifthelittleboyisn’tsureaboutsomething,hewillaskthesame...

问题详情：

 If the little boy isn’t sure about something, he will ask the same question ____________ until he is sure about it.

A. once again        B. over and over again         C. once again     D. over again

【回答】

B

知识点：词组 短语

题型：选择题