1 . There are around 100 tribes that live in global isolation, mostly in South America and India.
The Sentinelese(250 people)have lived on one of the Andaman Islands in Eastern India for 60, 000 years. They protect their island by fighting against people from outside. Their language is different from any other known language.
Another Andaman tribe is the Jarawa(300 people). In the past, they were independent and fought against anybody trying to make contact with them. But in 1998, the Indian govemment built a road across their land, and since then, they’ve had more contact with the outside world.
Some Amazon tribes avoid contact because of unhappy memories. The Mashco—Piro left their vegetable gardens after rubber companies killed most of their tribe at the beginning of the 20th century. Those who survived became nomadic(游牧的)and started hunting animals in the forest.
The Awa live in the Amazon forests of Brazil. Out of 350 members, 100 have no contact with the outside world. They left their villages and adopted a nomadic lifestyle around 1850 to escape attacks by Europeans. In the following years, farmers in nearby communities started cutting the trees to expand their farmland. The Awa lost most of their hunting land.
The few Amazon tribes that still exist are fighting to keep their traditional way of life.
Survival, an organization that fights for the rights of tribal people, says that uncontacted tribes are the most vulnerable(弱势的)humans on the planet and that’s why their environment should be unavailable to the rest of us.
After years of pressure, the organization got Brazil’s government to clear invaders from the Awa land. All non-Awa people are leaving so the tribe can get their forest back. But some think it’s impossible for tribes to stay isolated forever in a connected world. Contact will be made one day. So the question is：Whose choice should it be, ours or theirs?
1. What could be learnt about the Sentinelese from the text?| A．They speak the same language as the Jarawa. |
| B．They resist contact from the outside world. |
| C．There are about 350 members in their tribe. |
| D．They received help from the Indian government. |
| A．To avoid being attacked by Europeans. |
| B．To avoid being robbed by rubber companies. |
| C．To protect their hunting land. |
| D．To maintain their traditional way of life. |
| A．They should fight for their rights by themselves. |
| B．We should show them respect and not disturb them. |
| C．It’s impossible to stay isolated from the outside world. |
| D．We should help them get used to the connected world. |
| A．Doubtfully. | B．Critically. | C．Indifferently. | D．Objectively. |
2 . Indonesia has said the country would be removing its capital city, in part because it's sinking into the Java Sea. Jakarta is one of the fastest sinking cities in the world, according to the World Economic Forum, due to rising sea levels and the over-extraction of groundwater. But it isn't the only city in trouble. Here's a look at some others that are also at risk.
Houston
Houston has been sinking for decades and, like Jakarta, the over-extraction of groundwater is partly to blame.
The Houston Chronicle reported that parts of Harris County, which contains Houston, have sunk between 10 and 12 feet (about 3 meters), since the 1920s, according to data from the US Geological Survey. Areas have continued to fall as much as 2 inches per year, an amount that can quickly add up.
Lawmakers have tried to address the issue, creating a special purpose district meant to regulate the withdrawal of groundwater in 1975. But the problem has persisted, with privately owned wells and water suppliers continuing to pull from aquifers (蓄水层).
Lagos
The city of Lagos sits on the coast of Nigeria, constructed partly on the mainland, partly on some nearby islands. It's also Africa's most populous city. Its geography makes Lagos especially easily flooded, and the coastline has already been eroding. As sea levels rise due to global warming, the city is increasingly at risk.
One study from 2012 revealed that, because Nigeria's coastline is so low, a sea level rise of just 3 to 9 feet (about 1 to 3 meters) "will have a catastrophic effect on the human activities in these regions."
Washington
Washington is one of the most important cities in the US — and it's also sinking. Research from 2015 showed that America's capital will drop more than 6 inches (15 centimeters) in the next 100 years.
But unlike Jakarta, Washington's sinking has nothing to do with aquifers or rising sea levels — it's actually because of an ice sheet from the last ice age. A mile-high ice sheet pushed land beneath the Chesapeake Bay upward. When the ice sheet melted, thousands of years ago, the land settled back down. The researchers now believe that the area is gradually sinking, a process that could last thousands of years.
1. What is the common reason for the sinking between Houston and Jakarta?| A．the soft land | B．rising sea level |
| C．the eroding coastline | D．over-extraction of groundwater |
| A．positive | B．indifferent |
| C．unknown | D．negative |
| A．Houston | B．Lagos |
| C．Washington | D．Jakarta |
