高三七选五练习

根据短文内容，从短文后的选项中选出最佳选项。选项中有两项为多余选项。

The Rio Grande

Although not the longest in America, the Rio Grande is one of the most important. But, unlike other significant rivers（其他重要河流）, it is not used for shipping. In fact, ocean-going ships cannot sail on its water. _____36_____ Since 1846, it has been the official border (官方边界)of Texas and Mexico.

Rio Grande Geography

The Rio Grande is either the fourth or fifth longest river system in North America. It all depends on how it is measured. _____37_____And these course movements can cause it to be longer or shorter. At its last official measure, the Rio Grande clocked in（记录） at 1896 miles. The river starts in Colorado and extends downward to the Gulf of Mexico（墨西哥湾）.

_____38_____ Not only does the river extend south（向南延伸）, but it also starts in the mountains and gets lower and lower in altitude（海拔） as it extends to the Gulf.

The Rio Grande Today

_____39_____ Sadly, much of the water has been used up and parts of the river are most dry! This is because people take more water from the river than the river can get back from rain and other sources. Experts are working to correct this, though, with hopes of restoring the river to its past strength.

Today, the river is important as a source of water for Texas and Mexicans. _____40_____ Though borders like the Rio Grande separate nations, they are also shared spaces. The Rio Grande is therefore a symbol of friendship and peace between two peoples.

A. Usually, it is measured by length.

B. Because the river twists so much, it occasionally changes course（时常改变航道）.

C. The Rio Grande today is mostly used as a source of drinking water.

D. Today, the Rio Grande is the destination of tourists from all over the world.

E. What makes the Rio Grande so important is its location.

F. Downward is the best way of describing it too.

G. More importantly, it is a symbol of cooperation between two nations.

答案36-40 EBFCG