请问，这道题我错在哪里。谢谢！我不明白的是：63.had they found 为什么不对呢？我想表达的是没有找到的这样

请问，这道题我错在哪里。谢谢！
我不明白的是：
63.had they found 为什么不对呢？我想表达的是没有找到的这样一个结果，完成时正合适啊。
68.我选的是B，因为是限定那个小屋的。
75我选C，因为我觉得该是take off脱下的意思。
60，take the shirt from his back and （put ）it on the king，我觉得dress更合适，因为代表给他穿上。
原为如下：
A king once fell seriously ill. His doctors and wise men tried cure afer cure. But nothing worked.They were ready to give up hope when the king's old servant spoke up. He said, “If you can find a happy man ,take the shirt from his back and （60） it on the king, then he will recover.” So the king's officials rode far and wide. throughout the kingdom, yet nowhere _63__ a happy man. No one seemed content; everyone had some complaints. If a man was rich, he never had enough. If he was not rich, it was someone else's fault.If he was healthy.he had a bad mother-in-law. If he had a good mother-in-law, he was catching a cold. Everyone had something to complain about. finally,one night the king's own son was passing a small cottage _68__ he heard someone say, “Thank you ”. I've finished my daily labor, and helped my fellow man. My family and I have eaten our fill, and now we can lie and sleep in peace. what more could I want?“ the prince was very happy to have been found a happy man at last. He gave orders to take the man's shirt to the king, and pay the owner as much money as he _asked. But when the king's officials went into the cottage to take the happy man's shirt __75_ his back, they found he had no shirt at all.
63. A. had they found B. should they find C. could they find D. did they find
68. A. while B. which C. whenever D. when
75. A. from B. out of C. off D. down
请老师指教(⊙v⊙)