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课时作业(三十七) [选修8 Unit 2 Cloning]

[限时：30分钟]

Ⅰ.单项填空

1．I have no idea ________ the journalist could have got his information from. A．that B．why C．which D．where

2．One reason for her preference for city life is ________ she can have easy access to places like shops and restaurants.

A．that B．how C．what D．why

3．Along with the letter was his promise ________ he would visit me this coming Christmas.

A．which B．that C．what D．whether

4．People take naps at noon in warmer climates， ________ the heat makes work difficult in the early afternoon.

A．which B．what C．where D．when

5．[2018·课标全国卷] William found it increasingly difficult to read，for his eyesight was beginning to ________.

A．disappear B．fall C．fail D．damage

6．As is well known， everyone is forbidden ________ in buses， regardless of what they are.

A．to smoke B．smoking

C．to be smoking D．to smoking

7．—Please sit down and I'll cook you some coffee. —________.Let's come to the point first. A．You are welcome B．You needn't do so

C．Please don't bother D．You are indeed too polite

8．Last month， thousands of workers in that city went on ________ strike， demanding lower taxes and ________ end to cutting staff members.

A．a； the B．a； an C．/； an D．/； the 9．After the quarrel， I tried all my best to remove the misunderstanding between us， but all my efforts seemed ________.

A．in vain B．in case

C．in time D．in trouble

10．It is ________ great honor for China to develop ________ fastest computer in today's world.

A．a； the B．an； the C．an； an D．a； a

11．They had intended going into the country for the day， but were ________by reports of traffic jams.

A．put away B．put off C．put up D．pay down

12．There are laws in some countries which forbid advertisements ________ at inappropriate times and places.

A．being shown B．shown C．show D．to have shown

13．The way he did it was different ________we were used to. A．in which B．in what C．from what D．from which

14．________ was expected， only five people turned up at the party， ________ disappointed the hostess very much.

A．As； what B．As； which C．It； that D．What； which 15．________ afterwards， the police stopped the car and both men were arrested. A．Immediately B．Promptly C．Deliberately D．Shortly Ⅱ.阅读理解 People have been acting like people—in other words， they've been making tools， creating ceremonies， and sharing food—for a long time. That's the conclusion of a recent study from South Africa's southern coast.

There， in a cave lying above the sea， researchers from Arizona State University have found evidence that humans were behaving in surprisingly complex ways as early as 164,000 years ago. Our species， Homo sapiens， appeared an estimated 200,000 years ago.

The cave held three important clues about the behavior of these Stone Age people. First， the researchers found the remains of all kinds of shellfish. The people who lived in the cave probably collected these creatures from rocky shores and tide pools and brought them to the cave to eat.

The researchers propose the early Africans moved to the South African coast between 195,000 and 130,000 years ago. Around that time， the climate inland turned relatively cold and dry. Therefore， there were fewer plants and animals to eat away from the coast.

When these ancient people moved to the coast， they probably experienced a major cultural shift， the researchers suspect. That's because observations of modern hunter－gatherer societies suggest that men are more likely to hunt for big animals when people live inland. On the coast， women play a more important role in providing food by gathering plants and shellfish.

As for the second clue， the researchers unearthed 57 pieces of reddish pigment(颜料). The researchers think that the cave habitants used the paint for coloring their bodies or for other ceremonies. Symbolic behavior is a clearly human feature.

Finally， the search discovered over 1,800 stone tools， including well－crafted blades(刀片). These blades came in various sizes. The smallest were just less than a half－inch wide. Ancient people may have attached these blades to the end of a stick to make spears or other tools.

16．What is the passage mainly about？ A．Ancient cave behavior.

B．New evidence of ancient life. C．The history of human beings. D．Human behavior's development.

17．The early Africans moved to the South African coast with the main purpose of ________.

A．avoiding badly cold and dry weather B．seeking the cultural development C．seeking enough food to live on D．living a newer and better life

18．According to the passage， the cave habitants________. A．knew how to use colors for decoration

B．made a living largely by hunting animals C．only could made tools with rough blades D．could hunt for fish in the sea with ships 19．After the early Africans moved to the coast， what probably happened to their culture？

A．Women's role was as important as men's role in families.

B．They were no longer used to living inlands but living on the coast. C．Men's role was more important than women's role in earning food. D．Women's role was more important than men's role in earning food.

20．The new discoveries in the cave should support the theory that ________. A．modern human behavior developed smoothly fast from the ancient time B．modern human behavior developed slowly from the ancient time

C．South Africa is the birthplace of the earliest human beings in the world D．modern human behavior is largely the same as ancient human behavior

Ⅲ.阅读表达

阅读下面短文并回答问题，然后将答案写到相应的横线上(请注意问题后的词数要求)。 [1]It's safe， it's simple， and it works： Drinking right amounts of water can really help you lose weight， new research shows.

[2]In what researchers claim is the first－ever trial of the effect of water consumption on weight loss， scientists from Virginia Tech found that dieters who started each meal with two glasses of water lost nearly five pounds more， on average， than dieters who did not，over the course of 12 weeks. There's no shortage of clear