来帮个忙After finish his homework he went on --------a letter to his _英语解答

来帮个忙
After finish his homework he went on --------a letter to his parents.
A,write B writing Cwrote D to write

人气：170 ℃　时间：2020-03-21 21:55:38

解答

B
这里考查的是go on 词组的固定搭配用法~
go on +doing
所以选B