2._____the programme,they have to stay there for another two weeks.
问题描述：
2._____the programme,they have to stay there for another two weeks.
A.Not completing B.Not completed
C.Not having completed D.Having not completed
D为什么不对
答
肯定句是：
Doing sth.
Having done sth.
否定句是：
Not doing sth.
Not having done sth.
这是固定的,你要记住哦~哦哦 是固定的呀 那我就懂了！谢谢！