题目

根据短文内容和首字母提示完成所缺单词。More and more families go on a car trip each year. But the thought of trouble on the road may p 【1】 you from going out. To avoid(避免)trouble, you need to m 【2】 a careful plan for your trip.First of all, choose a proper route for your trip. Consider (考虑)w 【3】 you are going and find some possible routes to it. Traffic and the t__【4】_ that you will spend on the road must be considered when you decide one.Consider your luggage(行李) needs. B 【5】 you begin packing your things, think about how many people will be i7．下列物质的用途与其性质的对应关系错误的是（　　）A．H2有可燃性B．CO有还原性C．液化石油气可燃性D．Al有还原性