IV. 单词拼写：（共10小题，每小题0.5分，满分5分）
66. Between Italy and France, there is a mountain r________ called the Alps.
67. Considering size and population, how big is the European Union c__________ with China?
68. A tornado is a r__________ column of air from a thunderstorm to the ground.
69. What c________ the terrible fire? It was a burning cigarette end.
70. Oxford and Grenoble are both m_________-sized towns of between 100,000 and 200,000 inhabitants.
71. The countries are independent and are ___________(统治)in different ways.
72. Paris is the capital and largest city of France, __________ (位于)on the River Seine.
73. The human development index has some _______________.(令人意外的事情)
74. In nine years, China increased life __________(寿命)by 13 years.
75. There was the ____________(可能；可能性) of a huge tidal wave which could flood half the island.