______the missing boy,they had to stay there for another two

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______the missing boy,they had to stay there for another two weeks.
A.Not finding B.Not found C.Not having found D.Having not found为何选C不选A

Not finding 意思是没有找（完全没有去找）
Not having found 是没找到（又尝试过找,但没找到）
他们尝试去找那个失踪的小孩,没找到,所以要再呆在那儿两个星期.

______the missing boy,they had to stay there for another two ______the programme,they have to stay there for another two 5.the program,they had to stay there for another two weeks. （）the project,they have to stay there for another two weeks 2._____the programme,they have to stay there for another two they plan to stay there for two weeks否定句,for two weeks划线部分提问 ( )the programming,they have to stay there for anthor two we 37.They had to stay there for a night because of the rain,__ (2/2) stay there for another two days.用attracte填空 they had to walk there,hadn't they?怎么改 he had better stay he They are going to stay there for a few days. 1.They will stay there for two weeks.____ ____ ____ they sta