--They out the problem, but failed.
--What a shame ! I never thought it was going to happen like that.
A. managed to work
B. managed working
C. sought working
D. sought to work
网友回答
A. managed to work
B. managed working
C. sought working
(答案→)D. sought to work
解析： 题中的sought为seek的过去式，与它构成的短语为seek to do 试图做某事，根据第一句话的后半句but failed，可排除A选项，因为manage to do 意为设法做成某事，B、C搭配不对，所以选D。第一句句意为他们试图解决这个问题，但是失败了。