阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式

    Dear Bob, Thank you for your last letter. Let (I) tell you something about my summer vacation.

    I went to Beijing Zoo. It was really (interest). I saw some baby pandas, lions and tigers. I liked them very much they were cute. After visiting the 200, I went to the Great Wall Jack by bus. It was a little cold in the mountain. But (lucky),we had coats (大衣) with us. It took us long (get) to the top of the mountain. It was tiring but we felt (excite). We (take) many great photos there. I also went to the Summer Palace. I saw many beautiful (flower), but we didn't know (they) names.

    It was a great day. We really had a great time there.