As everyone knows, there are many 　16　 of transportation in the world, like bicycles, buses, ships, trains and 　17　 .
If you are in big  18　like Shanghai or Beijing, maybe you get to school   19   a subway or you have to 　20　 to school because you live in a mountain village. Here I am just trying to say something about　21　 .
Ten years　22　, bicycles were very　23　in most villages.  24　 family had one or two of bicycles. Children got to school by bicycle; 　25　 rode bicycles to go shopping. Then motorcycles (摩托车)   26   to become popular. People no longer rode bicycles because motorcycles ran   27   faster.  But now, in some countries，bicycles are highly suggested
  28   the main means of transportation. They think buses, cars and motorcycles pollute(污染) the air but bicycles   29   . So, to live a low-carbon life,   30   a bike is a good way.

A．kind B．kinds C．mean D．way

A．other B．others C．the other D．another

A．cities B．countries C．villages D．countryside

A．on B．by C．in D．of

A．on foot B．walk C．walks D．runs

A．bicycles B．motorcycles C．buses D．cars

A．later B．before C．ago D．after

A．cheap B．important C．expensive D．popular

A．All B．Both C．Every D．Most

A．women B．boy C．woman D．girl

A．begin B．began C．begun D．start

A．more B．much C．less D．most

A．for B．in C．at D．as

A．not B．don’t C．doesn’t D．didn’t

A．riding B．rides C．rode D．ride