.It ________ I arrived at the station ________ I found the train was delayed.
55. There have been many changes in _____ history of _____ English language.
56. A major earthquake _____8.0 on the Richter scale strongly _____ Wenchuan County in Sichuan Province at 2;28 p.m. on May 12, 2008.
57. ---These boxes are too heavy for me to move. ---Don’t worry; I’ll give you a hand ______ them.
58. --- Do you still remember when we went to the Summer Palace? --- I can’t remember it well, but it _____ sometime last July.
59. The _____ of blood always makes him feel sick.