Question

"_________ 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

Answer 1

答案C
complete the programme与句子主语they的关系是主动的，应该用现在分词形式，可以排除B项。not complete的动作发生在have to stay之前，所以应该用完成式的现在分词，可以排除A项。D项的否定形式不对，非谓语动词的否定式一般是在其前加not。