the program, they have to stay there for another two weeks.
A. Not pleting
B. Not having pleted
C. Not pleted
D. Having not pleted
网友回答
A. Not pleting
(答案→)B. Not having pleted
C. Not pleted
D. Having not pleted
解析：考查现在分词的否定式，they和plete是主动关系，用现在分词做状语，not应放在doing/having done前，句意：没有完成计划，我们不得不再待两个星期。故选B。