My best friend Alex failed in the math competition. Id like to.A. dress him up B. pick hi

问题补充：

My best friend Alex failed in the math competition. Id like to.

A. dress him up B. pick him up C. cheer him up

答案：

解析：根据句意：我最好的朋友Alex在数学竞赛中失败了，我想是他振作起来。dress up打扮；pick up捡起；cheer up使……振作。故选C。