31. To save energy or water, you’d better ________.
A. drythings in the sun
B. drive a car to work
C.take long showers
D. brush teeth with water running
32. To call on more people to work together, you should_______.
A. save energy and water
B. be an advocate
C. reduce, reuseand recycle
D. be friendly to wildlife
33. Whatdoes the underlined word “vulnerable” mean in Chinese?
A.野生的
B.家养的
C.强壮的
D. 弱小的
34. Thepurpose of the passageis to______.
A. help the kids learn English
B. help people learn more about kids
C. teach kids how to keep animals
D. tell the kids how to protect the earth
35. This passage isfrom_______.
A. a guidebook
B. a science book
C. a website
D. a newspaper
C
We see humans all around us. But when was the first human seen? Early humans did not leave behind any written records. However, they left behind many paintings on the walls of the caves(洞穴) wherethey lived. These paintings tell about their life, and we know these early humans walked on four limbs(四肢)like apes(猿).Also, they did not live at one place but moved from place to place in search of food and water.
Without any tools, early humans used stones, bones of animals, and sharp pieces of wood to dig, hunt and cut their food. They also used these to protect themselves from animals.Since stones were used to make tools, this age was called Stone Age.
With timegoing, tools made of bones and stones were replaced with metal(金属的) ones whichwere stronger, sharper, and long-lasting. Metals were also used for farming and making knives.Copper(铜)was the first metal to be used.
The first fire that early humans noticed was natural fire caused by lightning(闪电). With fire, early humans could now light up dark caves. They could keep themselves warm during cold weatherand cook meat. Also thefire could driveanimals away.
Early humans noticed new trees growing from the seeds(种子)that fell to the ground from the fruits. This gave them the idea that they could make their own foodby planting seeds,which led to farming. With the beginning of farming, early humans began to settle down(定居). They moved out of the caves andlivedon farms and near their fieldstogether, then the first villages came up.
Raisinganimals was a bigevent in human history that changed the life of early humans. The wild dogs were probably the first animal to be raised. Astimewent, goats, sheep, cows, donkeys, and horses were kept, too. This led to herding(畜牧业). Milk, meatand wool came from these animals.
36.Early humans’paintings don’t tell us _____.
A.when the first human appeared
B. how they walked
C. where they lived
D. how they lived
37. Early humans had to move around in order to ____.
A. find more caves to live in
B. protect themselves from animals
C. look for food and water
D. make kinds of tools
38. Early humans used fire to ______.
①light up dark caves
②keep themselves warm
③cook meat
④drive animals away
⑤make knives
A.①②③④
B. ①②④⑤
C.②③④⑤
D. ①②③⑤
39. Early humans were able to live in one place when _______.
A. they could walk on two feet
B. they could use metals
C. they knew how to farm
D. they knew how to use fire
40. Which statement is right according to the passage?
A. The first tools were made of copper.
B. The first fire noticed by early humans was caused by lightning.
C. The first villages came up before the farming appeared.
D. The first animal to be raised was sheep.
D