kind of car

（题目问的是租车前你应该仔细考虑些什么。 根据录音“before renting a car, think carefully about the kind of car you need” 可知， 在租车之前， 应该仔细考虑需要哪种车。 因此答案为 kind of car。）

【录音原文】
You want to rent a car? OK, I have a few tips for you. In the first place, (16) before renting a car, think carefully about the kind of car you need. Are you traveling alone or with your family? If you are traveling with your children, you need to rent a big car. (17) You also need to spend some time comparing prices offered by different car rental companies.Many companies offer special promotions. By doing so, you can often get a best deal and save a lot of money. Secondly,(18) when renting a car, be sure you have the car rental company‟s phone number in case you need to contact the company. Most often companies have a 24/7 service number. Thirdly. (19) if you are returning the car to an airport,remember to leave enough time to check in to your flight. Finally, don‟t forget to fill the gas tank before you return the Car. (20) This will save you extra fuel and service fees.