Lilythinksyoungpeoplecanlearnhowtocareforothers　　　　kee...

問題詳情：

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

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

【回答】

C 

知識點：介詞和介詞短語

題型：選擇題