____ their hats into the air, the fans of the winning team let out loud shouts of victory.
52. _____ I went to the hospital to see Jack, who had _____ had an operation.
51. They planned to go to Beijing for sightseeing, but because of their daughter’s unexpected illness they had to stay at home _____.
50. The lazy boy got up very late and went to school in a hurry. When he arrived at school, he found that he had put his socks on _______.
49. --- Does he study very hard at school? --- Yes, he studies _____.
48. I will ask my father to telephone you _____ he comes back.