May is National Bike Month. a month-long event trying to get couch potatoes outside, cars off the roads and subway trains empty. It encourages everyone to get back onto their bicycles to enjoy riding a bike an often as they can during the month (and hopefully longer). May in the beginning summer and warm weather, so why not start right away and enjoy sunshine!
Ride Out to Protect the Environment
Bike month helps everyone make their efforts to improve theenvironment. If you’rebiking to school, you are helping bring down the air pollution. It is the most common form of pollution andby getting your family to stop driving and start riding a bike, you can do your part in improving the air quality.
Count Down Those Calories
Cycling isn’t just good for theenvironment; it’s good for you too. Riding a bicycle burns calories and helps keep you healthy. It not only improves your physical health, but also your mental state of mind. It can really help you be a happier person.
Share the Sunny Summer
So get into that shed, and take out your old bike. Paint the bike blue. Put on a nice coat. Load up a number of songs. Invite a group of friends to get on the bikes and ride this May! Be a fun-in- the-sun child! Enjoy yourself!

【小题1】The second paragraph mainly tells us that riding bicycles       .

You can’t see any object unless light from that object gets into your eyes．Some of the things you see give off light of their own。The sun，the stars，a lighted lamp are the examples that can be seen by their own light．But most of the things you see are not giving off light of their own．They are just reflecting(反射)light that falls on them from the sun or some other luminous bodies．The moon，for example，doesn’t give off any light of its own．It is not 1uminous．You see it because sunlight falls on it and some of the sunlight reflects on the earth．So moonlight is only second—hand sunlight．
When you look at a book，it sends some of the light which fails on it to your eyes，and you see the book．If light could be kept out from where you’re so that there would be no light from the book to reflect．Then you couldn’t see the book even with your eyes wide open．Light travels so fast that the time in which it travels from the book you’re reading to your eyes is as short as if there were no time at time．Light reaches us from the moon，which is about 380，000 kilometres away，in only a little more than a second．

1. 1.

   You can see the book because________．

   1. A.
      your eyes are close to it
   2. B.
      it reflects some of the light
   3. C.
      it has light of its own
   4. D.
      it is big enough to be seen
2. 2.

   The Chinese meaning of the world“luminous”is close to_______．

   1. A.
      闪光的
   2. B.
      看不见的
   3. C.
      发光的
   4. D.
      明亮的
3. 3.

   ________has light of its own．

   1. A.
      The moon
   2. B.
      The earth
   3. C.
      The sun
   4. D.
      The satellite of Dong Fong Hong
4. 4.

   Light travels about_________kilometers per second．

   1. A.
      300，000
   2. B.
      100，000
   3. C.
      400，000
   4. D.
      190，000
5. 5.

   Which of the following is TRUE?

   1. A.
      All the things you can see give off light．
   2. B.
      Light from the book is much faster than that from the moon．
   3. C.
      The moment you open your eyes，the light from the book travels to your eyes．
   4. D.
      Light travels so fast that there is no time for you to read．