Lilythinksyoungpeoplecanlearnhowtocareforothers　　　　kee...

问题详情：

 Lily thinks young people can learn how to care for others 　　　　 keeping pets.

        A. at                      B. in          C. by                  D. on

【回答】

C 

知识点：介词和介词短语

题型：选择题