Certainly, the most popular method of traveling used by Americans is the privately-owned automobile. The vast majority of Americans have a car, and many families have two.【B1】during your visit to the United States, you may decide to rent a car to travel outside the city or to travel to other parts of the country. Car rental companies are【B2】in the telephone book and are located in most cities and towns.【B3】, there are usually rental cars at airports and train and bus stations. As is true everywhere in the world, you can rent a car【B4】the day, week, or month. Some companies【B5】have special weekend rates that you may find especially interesting if you have only a limited【B6】of time to travel around the area you are visiting. Since each company has its own rules and rates, it is a good idea to【B7】prices among companies to get the best rates to suit your purposes. For example, most car rental costs【B8】how long you plan to keep the car and how far you travel. However, some companies may include gasoline in their rates, but【B9】do not. Some companies require that you【B10】the car to its starting point; others will permit you to leave the car in another city.

【正确答案】 B

【答案解析】解析：sometimes＝occasionally有时；sometime＝at a particular but unspecified time某个时候。在这里，sometimes更符合上下文的意思。其他两个选项的用法有错误。

【正确答案】 C

【答案解析】解析：此题的关键是确定本段前两个句子之间的关系。however引导转折和对比关系；therefore和consequently引导因果关系；in addition引导并列关系。此处应该属于并列关系。

【正确答案】 A

【答案解析】解析：此题属于可数名词与不可数名词语法考点。time是不可数名词，对其修饰词应该是amount而非修饰可数名词的number。其他选项的意思不符合本句的意思。

【正确答案】 D

【答案解析】解析：注意这四个词组意思的区别：insist on坚持；work on从事；count on依靠；depend on取决于。句子的意思是：租车费用的多少取决于租车时间的长短和行车距离。

【正确答案】 C

【答案解析】解析：本题属于语法考点。要正确理解四个选项的区别：the other修饰两者之间的后者；other只能修饰单数名词；others用来修饰复数名词，一般与前面的some连用；one another修饰三者以上的单数名词的后者。