These days, many students like playing 3Dgames. Do you know what 3D games are like? In most 3D games, game players need to control a character (人物). The character can be a robot or a soldier. Game players usually use the mouse to make the character move around in his own world. Game players can find things such as food and weapons to help them go on with the game. The character can go straight, sit down, turn left, turn right or pick up things in the game.
Some 3D games have many levels(等级). The character needs to finish different goals（目标） for each level. Game players can against their computers, and sometimes they can play with other players online（在线）. It’s great fun to play 3D games. But playing 3D games for long is not good for our study.
【小题1】In most 3D games, game players need to _______.

Look at the center circles of Diagram (图) A and Diagram B.  Which of the centre circles looks larger? 
Take a first look and you probably think that the centre circle in Diagram A is smaller than that in Diagram B. In fact , they are exactly the same size.
Then look at the picture on the right. What do you see? A vase ? Or two faces? Does the picture change quickly from one to the other again and again? Maybe or maybe not, but you can never see them at the same time. 
"What's happening? Is something wrong with my eyes?" You may wonder at what you see. Don't worry. Here is how it goes:
When we look at things, our eyes send messages to our brains and then our brains interpret (解读) the information. However, sometimes our brains interpret the received information in a wrong way. It seems that our eyes are playing a joke on us. This often happens and we call it "Visual illusion" (视觉错误). 
Movie makers often make use of illusions. They make the objects around actors much smaller or bigger than usual. This makes us believe that the actors are much larger or smaller than they usually are. The movies Jurassic Park and Honey I shrunk the kids just make use of illusions.
【小题1】The centre circle in Diagram A looks smaller than that in Diagram B. That's because           .
A. something is wrong with our eyes
B. the two circles are not the same size
C. our brains interpret the information in a wrong way
D. the two pictures change quickly from one to the other
【小题2】What's the right order according to the passage?
a. We look at things with our eyes.              b. Our brains interpret the messages.
c. Our brains tell us what we have seen.      d. Our eyes send messages to our brains.

根据短文内容，问答下列问题。

Hands play an importanty part in our daily life.But do you know which of your two hadns you use more?Very few people use both hands epually well.Most of us are right-handed.Only about five people out of a hundred are left-handed.New-born babies can take hold of things with either of their hands,but in about two years they usually use their right hands.Scientists don’t know why this happens.
Monkeys are our close relatives in the animal world.Scientists have found that monkeys like to use one of their hands more than the other,but it can be either hand.There are as many right-handed monkeys as left-handed ones.Next time you visit a zoo,watch the monkeys carefully,you will see that some of them will use their right hands and others will use their left hands.But most of the people use their right hands better and this makes life difficult for those left-hadned people.We live in a right-handed world.
【小题1】How many people among 100 people use their left hands better?
A.5%.                   B.50%.                C.95%.
【小题2】What’s the meaning of the underlined word “equally” in Chinese?
A.公正地              B.均等地               C.平凡地
【小题3】New-born babies can use __________.
A.both of their hands    B.neither of their hands    C.their right hands
【小题4】Which of the following is true?
A.There are more monkeys using their right hands than left hands.
B.There are more monkeys using their left hands than right hands.
C.There are as many right-handed monkeys as left-handed ones.
【小题5】“We live in a right-handed world.”means __________.
A.Most people use their right hands better.
B.Few people use their right hands better.
C.Half of the people use their right hands better.