Bicycles are a great way to get around. They’re fun to ride, especially down hills. And, a

Bicycles are a great way to get around. They’re fun to ride, especially down hills. And, as you speed along the road, you might also think of ways in which you could improve your bike— make it safer, more efficient, or more fortable. In fact, the two-wheeled machines make for some cool science projects.
This year's Intel International Science and Engineering Fair (ISEF), held last May in Cleveland, featured（had）three bicycle projects from three countries. Like many of the other experiments presented at ISEF, the bike projects showed that some of the most interesting scientific research often begins by taking a closer look at things you care about.
Renato Angulo Chu had even grander ambitions. The 12th-grader from Lima, Peru, wanted to address some of his country's economic troubles.
I see a problem in my country, Renato said. If you go to the forests in Peru, in some places you cannot find electricity. If you go with my bicycle, you can turn on the lights.
Renato, 16, spent 3 years designing his special Multibike. The device looks like a fixed exercise bike. It has wires fixed along the frame and a blender strapped (fastened) to the back. Turning the pedals operates the blender. The same principle can be used to sharpen knives or sweep city streets.
The Multibike can work either as a fixed bike or as a bicycle able to travel city streets and country roads. It's made from inexpensive materials, and the user gets exercise while pedaling to operate a machine.
You pedal the bike, and you can mix any drink you want, Renato said. More importantly, he added, the same concept could be used to bring light to houses in remote regions of the rainforest.
【小题1】What can we learn from the first paragraph?A．Bikes should be made more fortable to ride.B．You can improve your bicycle for science research.C．Many inventions are connected with the bicycle.D．Bicycles are the best way to go about【小题2】Which of the following is true according to the passage?A．ISEF is an exhibiton displaying bicycle experiments designed by students.B．Looking closely at things you are concerned about can lead to scientific research.C．Renato’s improvement of the bicycle has solved the country’s great problem.D．Renato’s special bicycle will soon be put into use in remote areas.’【小题3】The underlined word “address” in the third paragraph probably has the same meaning as     .A．make address writtenB．give up C．work atD．speak at【小题4】Renato’s special Multibike has all the following  EXCEPT      .A．making knives sharpB．mixing any kind of drinksC．producing electricityD．operating a machine with its own electricity【小题5】It can be inferred that Renato’s special bicycle is mainly designed for     .A．distant areas in the rainforest without electricity.B．the use of his own family to make life easier.C．the petition of ISEF to win money to support remote rainforestsD．enough exercise by pedaling itB