._____the crisis of economy getting more and more serious, the government is searching for ways to improve people’s life.
59. ---I’m afraid that I am_________you much trouble. ---No. It’s my duty to do so
58. Though his classmates are all ahead of him, he is studying very hard to _____ them.
57. Yesterday I was in the rain on my way back home, and I got a bad could and coughed very badly.
56. The shopkeeper _____ the tramp(流浪汉) stealing sweets from the new supermarket and _____ him.
55. I can’t see John anywhere. Where _____ he have gone?