unit 9 wheels
一、词汇复习（课本回顾）
on your bike (1)
用方框中所给词汇的正确形式填空。
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benefit convenient flat provide save reduce cycling thief chip insert |
amsterdam is called the "city of bicycles" because it is _______ and therefore is _________ for bikes. in the 1960s, a group of ________fans had an idea of the "white bike ". they painted bikes white and allowed people to use them. they were hopeful that this would help people to ________energy, ________pollution and _________free public transport. but the_______took all the bikes within weeks.
more than thirty years later, with the help of computer _______, the “white bicycle” is back in town. to take a bicycle, you need to ________ a special card. in this way, people can enjoy the _______ of cycling in amsterdam for ma
