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5. let sb. do sth. 让某人做某事 8. start to do / doing sth. 开始做某事
写作练习：
会用过去时态叙述过去的事情如：A wonderful Day My school trip
An forgetful Day
My friend Li Hua came to visit me on May Day. During the following days I showed him around the city. We went to the Guangzhou Museum on the morning of May 2. We learned much about the history of Guangzhou. In the afternoon., we climbed the Baiyun Hills. It was really great fun! In the evening. I took Li Hua to the night zoo. It was interesting to see animals at night. The next day, we went to the bookshops to buy books. Though we were very tired, we enjoyed ourselves very much.
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