《2025年基础知识同步训练10分钟八年级英语上册沪教版深圳专版》

C
Which of your hands do you use more often? A few of us use both of our hands well. Most of us are right-handed. Only about five people out of a hundred are left-handed. New-born babies can take things with either of their hands, but after about two years, they like to use their right hands. Scientists don’t know why this happens. They have studied it. They think our animals ancestors( 祖先 ) were right-handed, but this may not be true. Monkeys are our closest relations in the animal world. Scientists have found that monkeys like to use one of their hands more often than the other one, but it can be either hand. Next time you visit a zoo, watch the monkeys carefully, you’ll see that some of them use their right hands, while others use their left hands. But men use their right hands better, and this makes life difficult for the left-handed ones. We live in a right-handed world.
Some scientists have found that more of successful people are left-handed, but they don’t know why. Now, they are working hard to discover the secret.
( C)21. What percentage of people are right-handed according to the passage?
A. 5%. B. 50%. C. 95%. D. 100%.
( B)22. New-born babies like to use _____ hands after about two years.
A. left B. right C. left or right D. both left and right
( D)23. Which of the following is TRUE according to the passage?
A. Scientists know why most of us are right-handed.
B. New-born babies can use either of their hands well all the time.
C. Our animals ancestors were right-handed.
D. Life for left-handed people is more difficult.
( A)24. According to the passage, what kind of animals are the closest to human beings?
A. Monkeys. B. Orangutans. C. Baboons. D. Macaques.
( B)25. What is the main idea of this passage?
A. Most people use their left hands more often.
B. Most people use their right hands more often.
C. Reasons why most people use their right hands.
D. Researches on the animal ancestors of human being.

答案： 21. C
22. B
23. D
24. A
25. B