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You may know the English letters A, B and C. But do you know there are people called ABCs? You may like eating bananas. But do you know there are such people with the name of "banana persons"? Are these people from "another planet (星球)"? No. They are just Chinese people like you and me.
ABC means American-born-Chinese. An ABC is a Chinese, but was born in the United States. Sometimes, people call an ABC a "banana person". A banana is yellow outside and white inside. So, a "banana person" is white inside -- thinking like a westerner and yellow outside -- looking like a Chinese.
Do you know why? Usually, ABCs know little about China or Chinese language. Most of them don't speak Chinese. Also, they are not interested in Chinese politics (政治). But if ABCs can't speak Chinese. can we still call them Chinese people? Yes, of course. They are Chinese. They are overseas (海外的) Chinese. These people may be citizens (公民) of other countries like the US, Canada or Singapore. But they have Chinese blood. Their parents, grandparents or even great-grandparents were from China. They all have black eyes and black hair. But they are not Chinese citizens. They are not people of China. For example, we all know the famous scientist C.N. Yang (杨振宁). He got the Nobel Prize in Physics in 1957. Chinese people love him. But he is an American citizen.
1．"ABC" in this passage means "_________".

A．a kind of banana

B．three English letters

C．American-born-Chinese

D．Chinese-born-America

2．Chinese born in western countries are called "banana persons" because _________.

A．their bodies are white inside but yellow outside

B．they think like westerners but look like Chinese

C．they were born in China but go to study in America

D．they were born in America but work in China

3．The underlined word "blood" may probably mean _________ in the passage.

A．血统

B．洪水

C．血样

D．流血

4．C. N. Yang is mentioned here to show that __________.
A. American Chinese are great
B. Chinese people can win Nobel Prize
C. American Chinese aren't Chinese citizens
D. we don't like him
5．This passage mainly talks about _________.
A. Chinese
B. the Nobel Prize
C. the story of C. N. Yang
D. the meaning of "ABC"