为了让一切创造社会财富的源泉充分涌流，改革开放以来，我国进行了经济制度的改革，形成了的基本经济制度。（    ）

① I like swimming. What about you? ____     A. I like swimming, too

② What did you love to do? ____     B. I went to a park.

③ Where did you go last week? ____     C. I usually read books.

④ What do you usually do on weekends? ____     D. I loved to ice-skate.

⑤ How did you go to school yesterday?____     E. By bus.

    Every year on April 22, People all over the world celebrate Earth Day. It is a time to work to keep our earth clean. People plan projects to clean up the land, air and water.
    U.S. Senator Gaylord Nelson first thought of the idea for Earth Day in 1962 when he saw polluted rivers and cities with smoke. He needed to get support from Americans to clean up the earth. Finally, on April 22, 1970, 20 million Americans celebrated the first Earth Day! Now many countries around the world celebrate it, and you can, too.
How can you celebrate Earth Day? Here are a few ideas:
Join a clean-up project------Clean up your street or a favorite beach.
Save energy------Turn off the lights when you leave a room, and use public transportation.
Use less water.
Reduce(减少)/ Reuse/ Recycle ------ Practice the three Rs: First, reduce how much you use. Then reuse or recycle what you can.
You can make a difference on Earth Day and every day!