完形填空 (共25小题,计分25)
阅读下面短文,掌握其大意,然后从1--25各题所给的四个选项中,选出一个最佳答案。
The U.S . 1 Alaska from Russia about 100 years ago. The U.S. paid 2 than two cents an acre(英亩). One Alaska's land is only two miles 3 a Russian island. The 4 state is Washington,500 miles 5 .
Alaska is more than twice 6 big as Texas(德克萨斯州). It has many different kinds of 7 . In some areas the temperature can go as 8 as 57°below zero. It can also go as 9 as 38°above zero.