Some people plan to a volunteer program to help the disabled children. A. put up B. think

问题补充：

Some people plan to a volunteer program to help the disabled children.

A. put up

B. think about

C. set up

D. cheer up

答案：

A. put up

B. think about

(答案→)C. set up

D. cheer up

解析：句意：有些人计划建立一个帮助残疾儿童的志愿者项目。put up张贴，挂起；think about考虑；set up建立；cheer up使振作起来。所以选C。