完形填空。
The summer vacation is the best time for students. They can go outdoors and have fun. They can go to big cities to 1, or go to the countryside to enjoy the beauty of 2.
Peter is an American middle school student and he loves 3 very much. He always travels in his country.
This summer vacation he did 4. He was interested in Chinese history. 5 he flew to Beijing and Xi'an for the summer vacation. He left New York on July 12th and 6 New York on the last day of August. He wanted 7 a great vacation, and in fact he did have a wonderful time. During the 8, he visited places of interest and bought something. And at night, he took walks 9 the beautiful night. It's really a 10 summer holiday.