57. It’s about eight thousand five hundred kilometers from China to Canada.(就划线部分提问)

　　　 ________　 ________ is it from China to Canada?

56. The two women are talking to each other.(就划线部分提问)

　　　 ________ are the two women ________?

55. Danny ________ (break) his tail at the Palace Museum last week.

54. My father ________ (go) to the factory from Monday to Friday.

53. The ________ (child) are packing their suitcases. They are going to Beijing.

52. Look! Jenny is ________ (look) out of the window of the train.

51. “Where ________ (be) you yesterday?”　 “I was in the library.”

50. I can see some girls __________ (play) on the square.

49. Laughing ________ (loud) is good for your health.

48. An airplane is ________ (fast) than a bus.