talk about怎么接动词they are talking about the poor children 他们正在谈论帮助那些穷苦的孩子 A; help B ; to help C; helps D; helping

问题描述:

talk about怎么接动词
they are talking about the poor children 他们正在谈论帮助那些穷苦的孩子 A; help B ; to help C; helps D; helping

选D,接动词的-ing形式.