问题
选择题
_______ 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
答案
C
此题考查非谓语动词的用法。否定词要放在分词的前面；由于前面的行为引发后面的结果，所以要用现在分词的完成时态。