To be /Being a volunteer in the mountain village makes me happy用哪个呢?为什么呢?

问题描述:

To be /Being a volunteer in the mountain village makes me happy用哪个呢?为什么呢?

如果你已经是个志愿者那么就有Being .意为作为一名志愿者、、
to be暗含着还没有成为志愿者的意思,有你有意愿成为志愿者的意思.