Passage 7

People who cannot tell all colors apart are said to be color blind.Most color-blind people can see yellow and blues,but confuse reds with greens.It is very rare for a person to be blind to all colors,but they may see everything in shades of black,white,and gray.不能辨别所有的颜色的人被称为色盲。大多数色盲的人可以看到黄色和蓝色，但混淆了红军与绿色。对所有颜色都色盲的人是非常罕见的，但他们在黑色，白色，灰色的阴影下可以看到一切。

It is interesting to note that many color-blind people don’t even realize that they are color-blind.They don’t know that the colors they are seeing and naming are not the actual colors that people with normal vision can see.This can be particularly dangerous when a color-blind person confuses the red and green of a traffic light.值得注意的是，许多色盲的人甚至不知道他们是色盲。他们不知道，他们所看到的和命名的颜色的颜色，不是正常的人可以看到的颜色。这可是特别危险的时候，当色盲的人混淆了红色和绿色的交通灯。

Color blindness is thought to be inherited(遗传).And although doctors have thought up tests to determine（测定）color blindness,there is no cure to treatment for it.色盲被认为是遗传的。虽然医生想到试验来测定色盲，但没有方法来治疗它。

1.A color-blind person can tell correctly red and green.

一个色盲的人能正确分辨红色和绿色。

A.T B.F

2.Many color-blind people are unaware(没意识到)that they are color-blind.

很多色盲人没有意识到他们是色盲。

A.T B.F

3.It’s especially dangerous for a color-blind person to cross a street when there are no traffic lights at the cross of the streets.这是特别危险的，对色盲的人过没有交通灯的十字街的马路

A.T B.F

4.A person who is color-blind is not allowed to drive.

一个色盲的人不允许开车。

A.T B.F

5.Up to now,doctors have found a way to free a person from his color blindness.

到目前为止，医生找到了一个可以从色盲中解放的方法。

A.T B.F

参考答案：BABBB