问题
选择题
_____________ the program, 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
答案:C
题目分析:句意是:没有完成计划,他们只好再呆两星期。因为是先没有完成计划,才要呆在那里。因为是先没有完成计划,然后才又待了两个星期,用现在分词的完成式,否定not放在having的前面。选C。