The mother often tells her son to be a good boy warning him to trouble.A. hold back fromB

问题补充：

The mother often tells her son to be a good boy, warning him to trouble.

A. hold back from

B. keep out of

C. break away from

D. get rid of

答案：

A. hold back from

(答案→)B. keep out of

C. break away from

D. get rid of

解析：此题考查动词短语辨析。keep out of “使避开某事物”，hold back from”退缩，踌躇”， break away from”脱离，挣脱（束缚）”， get rid of”摆脱，除掉”。