20．The price of gas has been going up．We don't know when it will end．Many people want to know （46）B they can save gas．The best way to save gas is to（47）C driving habits．
The faster you drive，（48）A gas you use．Drivers should slow down a bit to save gas．Driving at a steady （稳定的） speed helps save gas．It also helps you save gas when you （49）Dlittle by little．
The more you drive your car，the more gas you use．Think about the places you need to go（50）C leaving your home．You should do as many things that you need to do in one trip．Always try to pick（51）D route （路线） when going somewhere．
Cars that are in good working condition use less gas．（52）B the engine is running well．Check it if something seems wrong．
Tires （轮胎） are important，too．If the tires are in good condition，they will help the car roll better（53）B save gas．
Finally，think about using your car less．If you don't need to go far，（54）A or riding a bike is the best way．Take public transportation when you can．Leaving your car at home really saves gas．
These are just a few ideas （55）A can help you save some money at the gas station．Try changing the way you drive and see how much it saves you!
| 46．A．what | B．how | C．why | D．where |
| 47．A．keep | B．think | C．change | D．depend |
| 48．A．the more | B．the less | C．more | D．less |
| 49．A．hold on | B．put down | C．turn off | D．speed up |
| 50．A．after | B．until | C．before | D．during |
| 51．A．the longest | B．the most important | C．the most interesting | D．the shortest |
| 52．A．Agree | B．Make sure | C．Look over | D．Point at |
| 53．A．but | B．and | C．or | D．as |
| 54．A．walking | B．walk | C．driving | D．drive |
| 55．A．which | B．what | C．who | D．when． |
龙人图书快乐假期暑假作业郑州大学出版社系列答案
