80. ___________

80. Although she didn’t know the best way , but she insisted that she do it by herself.

79. ____________

79.It was my sister who first had the idea to cycle along the entirely Mekong River.

78.English began to be speak in both countries,　　　　　　　 78. ______________

77.The journey will begin at a altitude of 5000 metres. 　　　　77. ______________

76.Today , many people speak English than ever before. 　　　76. ______________

75. ____________

75.Late in the next century , people made voyages to conquer other parts of the world.

74. ______________