Lonnie Johnson always loved taking things apart（分开）． He（1） /'sʌmtaimz/ put them back together． Other times he made new things from different （2） （ part）． He learned how to use tools from his dad．
At 13， Lonnie put an old engine（发动机）on a homemade go﹣cart． He loved driving it around． He dreamed of being（3） inventor． By high school， Lonnie built a remote﹣control robot from some waste things． This won him first prize at the Alabama State Science Fair． His friends called （4） "The Little Scientist"． In college， Lonnie was an excellent student． After that， he （5） （become ）an Air Force officer， rocket scientist and business leader． （6） he never stopped inventing． You may have played with his most famous invention﹣﹣﹣the Super Soaker， a kind of water gun． Lonnie got the idea for this（7） /tɔi/ while working on another invention． When he tested a homemade part in his bathroom， it shot water（8） / ə' krɔs/ the room．
Today， Dr． Lonnie Johnson has more than 100（9） （use） inventions． However， he still keeps（10） （try）new things．
She used to d her car to work，but now she goes to work by bike．
If we go online，we can find p of useful information．
You can't get to the airport on time u you hurry up．
Shanghai is a beautiful city．I have been there t ．
Today there are 6.4 billion people on the earth．By the year 2050 there may be 12.5 billion．There are many people to feed．We need more and more food．
One way to produce more food is growing stronger plants．For thousands of years，farmers have made plants better．Every season，they pick the best plants for the next season．It words very slowly．Since 1983，scientists have been able to change plants more quickly by changing their genetic（遗传的） material．Foods from plants grown in this way are called genetically modified（转基因的） foods，or GM foods．
By changing the genetic material of a plant，it is possible to make new plants．Scientists make plants which are strong against plant diseases（疾病）．They can also help in our diseases，a kind of rice will be grown，for example，which stops people becoming blind．
Rich countries produce GM foods because they are easy to grow and bring in more money．Poor countries are interested in them because they help produce more food．
GM plants are not natural．No one knows how good or bad they are．Making GM foods is only one way of feeding people in 2050．There are strong feelings against them because they are unnatural．They may feed people，then hurt them or their children later．But both rich and poor countries are interested in their uses，and they are not going to go away．In 2050，we may think differently about them．
（1）There may be billion people by the year 2050on the earth．
A.6.4
B.12.5
C.18.5
D.20.5
（2）How have scientists been able to change plants more quickly？
A．By making the best plans．
B．By asking the farmers to grow plants
C．By changing planting environment
D．By changing their genetic material
（3）Why do rich countries produce GM foods？
A．Because they are easy to grow and bring in more money．
B．Because they are easy to grow and very cheap．
C．Because they help produce more food．
D．Because they are the best plants．
（4）Which of the following is NOT true according to the passage？
A．GM plants are not natural．
B．GM plants are strong against plant diseases．
C．Everyone knows how good or bad GM plants are．
D．GM foods may hurt people or their children later．]
（5）What can we learn from the passage？
A．GM foods will disappear one day in the future．
B．GM foods will not disappear in the future．
C．People will not be interested in GM foods．
D．People will have to stop eating GM foods．