根据所提供的信息，将志愿者的姓名填入相应的空白处，并阐明选择该工作的原因，同时选择符合句子的代词。
1. 例: Jennifer can help to fix up the machines in a poor elementary school because she (he, she) likes fixing
         up things.
2. ________ can help work in an animal hospital because ________ (he, she) likes               .
3.               can sing and dance to cheer up the old people because                (he, she) likes ________.
4.               can help the kids at local elementary schools to finish their schoolwork on Sunday because
   ________ (he, she) likes ________.