Question

    The longest river in the world is the Nile. It is 4,160 miles long. But the Nile is not the mightiest (浩荡的) river. The Amazon is. The Amazon is also the second longest river in the world. It is 3,900 miles long. How long is that? It is longer than a road going from New York City to San Francisco.

The Amazon is the mightiest for this reason. It has the greatest amount of water. More water runs out to sea than from the Nile. Mississippi, and Yangtze rivers combined. That's a lot of fresh water! The force of its current (水流) is great too. The current can be seen 200 miles out in the sea. There's a story to show the Amazon's amazing current. A ship sailed (航行) far away from Brazil. It ran out of drinking water. Another ship passed by. The first ship asked for water. Someone on the second ship said. "Just put your buckets (桶) into the sea."

Here are a few more facts. At its mouth, the Amazon is 90 miles wide. Even up the river, you can't see the opposite bank. The river is also very deep(from 22 to 76 meters). During rainy season, the river rises about 16 meters more. Big ocean ships can sail about 1,800 miles upstream (向上游). Smaller ships can sail 1,000 miles farther.

What's the most bloodthirsty fish in the world? No. It's not the shark. It's the Amazon's piranha. It is only about 10 cm to 20 cm long. It has sharp teeth. Thousands travel in a group. No animal can swim across the rivet. A 1,000-pound horse would be just bones (骨头) in three minutes. Are you planning a trip to the Amazon? Here's a piece of advice. Leave your swimsuit at home!

根据短文内容，选择最佳答案。

1.After reading this passage it seems clear that____________.

A.people do not drink the Amazon’s water

B.it would not be good to visit the Amazon during rainy season

C.sailing on the Amazon requires knowledge of its current

2.The writer helps you understand how long the Amazon is by___________.

A.telling how long the Nile is B.comparing it to a distance(距离)on land

C.comparing it with the Yangtze River

3.In Paragraph Four, the word“sharp”means“_________”in Chinese.

A.锋利的 B.急剧的 C.强烈的

4.The passage mainly tells us____________.

A.piranha in the Amazon B.traveling in the Amazon C.interesting facts about the Amazon

Answer

1.C

2.B

3.A

4.C

【解析】

本文主要讲了亚马逊河。亚马逊河是世界上第二长河，它的淡水量最大；亚马逊河有90英里宽，这条河也很深（从22米到76米）；世界上最嗜血的鱼是亚马逊的食人鱼；你打算去亚马逊旅行吗？

1.

推理判断题。根据第二段内容“The current can be seen 200 miles out in the sea. There's a story to show the Amazon's amazing current. A ship sailed…Just put your buckets (桶) into the sea.”可知，人们是可以喝亚马逊河的水的，故选项A错误；根据本段内容可知，文中没有说在雨季游览亚马逊河不好，故选项B错误；根据第二段内容所讲的故事可知，在亚马逊河上航行需要了解其水流的知识，比如可以从入海口往上游航行大约一千八百英里。故选项C正确。故选C。

2.

细节理解题。根据第一段“How long is that? It is longer than a road going from New York City to San Francisco.”可知，作者是通过把它比作陆地上的距离，来让人们知道河流的长度的。故选B。

3.

词义猜测题。根据前面的“What's the most bloodthirsty fish in the world? No. It's not the shark It's the Amazon's piranha”可知世界上最嗜血的鱼是亚马逊的食人鱼；根据最后一段“A 1,000-pound horse would be just bones (骨头) in three minutes. 一匹1000磅重的马在三分钟内就只剩下骨头”，结合选项可知，此处shark意为“锋利的”牙齿。故选A。

4.

主旨大意题。根据本文内容，主要讲了亚马逊河的知识，结合第三段开头“Here are a few more facts.”可知，本文主要是有关亚马逊的有趣现象与事实。故选C。