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.