61.The new term usually begins in ____(九月).

62.In autumn, leaves ____　 (变) yellow .

63.The climate of Shenzhen is quite ______ (不同)from that of Harbin.

64.Practice makes _________(完美).

65.There is much difficulty in __________(种植) trees in the desert.

66.The People's ________(共和国) of China is a large country with a long history.

67.With seven _________(科目) to learn, we are always busy.

68.There are 18 floors in the building. I live on the ______ (第四) floor.

69.The whole building was completely ______ (毁掉) in the Wenchuan big earthquake.

70. Teaching children with special needs requires ___ （耐心） and understanding．