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   小题1:   , but too    小题2:   cars make much pollution (污染). Now the idea of “car sharing”(拼车) is popular     小题3:    the world. That’s to say, more     小题4:    are sharing the use of the car. Not everyone   小题5:   a car. As we know, so many families have cars today, most of     小题6:   don’t use it everyday. Some cars  小题7:  most of their time staying in garages(车库). We don’t use them, but parking(停车) and other things can    小题8:   us a lot. That needs a lot of money.
To 小题9:  money, some people thought of the idea of “car sharing”. If we share a car, we can only pay for it  小题10:   we use it. Now more and more people would  小题11:  to do car sharing. In Switzerland(瑞士), about 40,000 people are  小题12:  this thing. Japan is  小题13:  trying to make “car sharing” popular around the country.
“Car sharing” is a new idea in transportation(交通). It is also very easy  小题14:  us to go everywhere we want without   小题15: a car.