(旅游) is becoming more and more popular. That is the (种类) of holiday these people are going on. A (旅行社) has (包机) the plane they are going to travel in, (预定)hotel rooms and even (order) the food they will eat. That is why it is called a package holiday. Such holidays are usually rather (便宜). That is (probable) why they are so popular. But not everybody likes them. Some people say you do not see very much of the country you go to. These young people are (出国), too. But they are not going on a package holiday. And their holiday will not be very expensive, (也). They will probably walk most of way. Sometimes they will get " (搭便车)" in trucks or cars. They will stay in (青年旅馆). Sometimes they will even sleep in parks or fields. That is how a lot of young people see the world these days.