Carl wanted to play a joke on Bob but gave himself by laughing.A. awayB. in C. outD. up

问题补充：

Carl wanted to play a joke on Bob but gave himself by laughing.

A. away

B. in

C. out

D. up

答案：

(答案→)A. away

B. in

C. out

D. up

解析：give away 暴露，泄露。