用所给单词的正确形式填空 。 1. The Blacks would like to stay in an (expensive) hotel to save money. 2. They are going to an (excite) place. 3.I don't think it's a good idea to travel there. It's too (tour) there. 4. During the vacation, they (trek) for five days along the banks of the Mississippi. 5. This is a____(peace) summer vacation.