题目

Old Henry looked after his flowers in the garden all the time. One day, a young painter went by his house. He looked at the nice garden and ______ if he lived in such a beautiful place, how happy he would be. Suddenly he found the old man terribly_____. He was so shocked that he walked to Henry and asked, _______ are you taking care of the flowers every day which you can't see in fact？Henry smiled, I can tell you________ reasons. First, I was a gardener when I was young and I really love this job. Second, although I can't see these flowers, I can touch them. Third, I can _______ the sweetnesWhat _____ in that shop? [      ]A. did  happenB. is happeningC. was happenedD. happen