阅读下面的短文,从所给单词中选出适当的单词,并且用其正确的语言形式填在标有题号的空白处,使句意通顺完整。（每空一词,每个单词使用一次）

them   people   many   like    have  do    around    save    cost   for     when   spend   also     popular    buy

Cars are very      , but too       cars make much pollution (污染). Now the idea of “car sharing”(拼车) is popular         the world. That’s to say, more         are sharing the use of the car. Not everyone      a car. As we know, so many families have cars today, most of        don’t use it everyday. Some cars    most of their time staying in garages(车库). We don’t use them, but parking(停车) and other things can       us a lot. That needs a lot of money.
To   money, some people thought of the idea of “car sharing”. If we share a car, we can only pay for it     we use it. Now more and more people would    to do car sharing. In Switzerland(瑞士), about 40,000 people are    this thing. Japan is    trying to make “car sharing” popular around the country.
“Car sharing” is a new idea in transportation(交通). It is also very easy    us to go everywhere we want without    a car.