Section Ⅲ Developing ideas

基础训练

单词填空 用所给词的适当形式填空。

1. From the girl’s look， we could see the   noise made by the enemy   her. （terrify）

2. The lab has recently been updated to allow for more   courses in   .（advance）

3. He is   to defending the villagers. But it is an open question how long that   can last. （commit）

4. Oil painting is to be   at a distance. I have now developed an   of it.（appreciate）

5. I can find out whether my   to an event are reasonable enough by reading abouthow others   on the Internet. （react）

6.   is a disease of modern society. There are those， you know， who are   for power. （greed）

单句表达 根据括号内提示翻译句子。

1. 现在的电子计算机是由五个部件组成的。（consist of）

2. 他不想向任何人显露他的恐惧。（expose... to...）

3. 毫无疑问，我们能把这项工程设计出来。（There’s no doubt that...）

4. 尽管价格昂贵，但它们经久耐用，永不过时。（although引导让步状语从句）

5. Johnson医生和我一直在试图增强他的体质。（have been doing）

提示写作

选用所给词汇或句型，造句并组成一段连贯的短文（80词左右）。

react survive bring... under control wipe out It is crucial to...

It is estimated that... I inferred that it was... Only in this way can we...

能力提升

阅读理解

A

Every autumn， polar bears living along the edge of the Canada’s Western Hudson Bay passthrough the sub-Arctic town of Churchill， Manitoba. The yearly movement has helped make thearea’s bears one of the most studied groups in the world. Bear-watching adds about $5.3 million tothe local economy each year. But a new report suggests Hudson Bay polar bear population hasdropped quickly during the past years.

Polar bears depend on frozen salt water， called sea ice， to help them hunt seals for food. Butthe Arctic is now warming about four times faster than the rest of the world. Around Hudson Bay，seasonal sea ice is melting earlier in spring， and forming later in fall. This is forcing bears to golonger periods without food.

John Whiteman， chief research scientist at the non-profit conservation group Polar BearsInternational said， “If continued sea ice loss cannot be stopped， it will one day lead to a total loss ofthe area’s polar bear population. Climate-caused changes affecting the local sea population mightalso be driving polar bear numbers down. If worldwide carbon emissions are not heavily reduced，most of the world’s polar bear populations will have been in danger of collapsing by 2100.”

The number of deaths in young bears and female bears in Western Hudson Bay is worrisome.“Being one of the southernmost populations， those Western Hudson Bay polar bears are the types ofbears we’ve always predicted would be affected by changes in the environment，” said StephenAtkinson， a lead writer of the government report who has studied polar bear populations for morethan 30 years. Young bears need energy to grow and cannot survive long periods without enoughfood. Female bears struggle because they use up a lot of energy searching for food while caring foryoung bears. “The ability of polar bears in the Western Hudson Bay to reproduce will decrease，because fewer young bears survive and become adults，” said Atkinson.

1. Why does the author mention the yearly movement of Hudson Bay polar bears？

A. To show economic benefits it brings. B. To introduce the topic of the text.

C. To call for protection of polar bears. D. To attract more visitors there.

2. What has caused the decline in polar bear population according to Paragraph 2？

A. Less access to food. B. Longer time of sea ice.

C. Sea pollution. D. Lower temperatures.

3. What does the last paragraph mainly tell us？