完形填空（共10分，每小题1分）
阅读下面的短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。
What can a city do about litter（扔垃圾）? Garbage in the streets is a big problem. There are some answers to this problem. A city can buy more garbage cans（垃圾桶）. ___   usually that doesn’t help much. In some cities，people don’t use garbage cans.
The police can ______. They can watch for litterbugs. Litterbugs are people who throw（扔） garbage on the ground. The police can tell them to ______! But sometimes even the police cannot help much. Some people don’t care（关心）. They ______throw garbage on the ground.
All people must want to keep parks and streets ______. Advertisements（广告） can help. People can talk about the problem ______the radio and television. They can ask for help. You can ask for help. You can ask your neighbours to care about the ______.
There is a popular saying，“Every little bit counts. ”In a city，every little bit of litter makes a difference. Every little bit of garbage makes a city ______. Every “litter” bit of garbage in a garbage can helps to ______a clean city.
People can make a city clean or dirty. In fact，only ______can make the difference between clean and dirty.

A．But B．So C．Or D．And

A．use B．answer C．help D．save

A．leave B．stop C．stay D．1ie

A．also B．too C．never D．still

A．quiet B．clean C．different D．traditional

A．on B．in C．with D．to

A．school B．park C．house D．city

A．clean B．dirty C．special D．green

A．sweep B．search C．make D．visit

A．people B．police C．parents D．students