Robots will have replaced people in factories．Many factories already use robots．Big companies prefer robots ---- they don’t ask for pay rises or go on strike, and they work 24 hours a day．By 2050, we will see robots everywhere ---- in factories, schools, offices, hospitals, shops and homes．

　　Medical technology will have conquered many diseases．Today, there are electronic devices that connect directly to the brain to help people hear．By 2050, we will be able to help blind and deaf people to see and hear again．

　　Scientists will have discovered how to control genes．Scientists have already produced clones of animals．By 2050, scientists will be able to produce clones of people, and decide how they look, how they behave and how much intelligence they have．Scientists will be able to do these things, but should they?

　　4．Which of the following can NOT be realized today?

　　A．Reading newspapers on a computer．

　　B．Making a space shuttle go into space and land on Earth again．

　　C．Creating cloned animals．

　　D．Choosing TV programs freely from a “menu”．

　　5．According to the text, some big companies prefer robots to human workers because human workers _____．

　　A．can work 24 hours a day B．often ask for more pay

　　C．are not clever enough D．are often late for work

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