课文背诵
People have been  1 cycling in Amsterdam for years. It is a good city for cycling because it is flat and therefore is convenient for bikes. There are also plenty of places for bicycle parking and most streets in the city centre have a bicycle path. Today some people cal the “City of Bicycles” because of   2  there.
In the 1960s, a group of cycling fans had an idea. They believed that it would be better for everybody if cars weren’t allowed in the city centre and only bicycles were.
They were hopeful that this would help to save energy,   3  and  4 . The group  5 and placed them in lots of neighborhoods around Amsterdam for people to use. Anyone was allowed to take them and use them for short journeys. Wherever someone finished a journey they would leave the bike there for someone else to use. The problem was that it didn’t work-thieves took all the bicycles within weeks!