[解析]
I went to the Summer Palace on last week.At the gate I happen to meet some America tourists.I greeted him in English and then we began to chat.I got to know that they were college students travel in China.They were busy with taking pictures and were much impressed with the changes∧had taken place in the past few years.After that,we went boating on a lake and had∧good time.We exchanged our email address so that we could write to each other in the future.They thanked me again and again.I was very glad to have such a chance to practicing my oral English.
详解:
1.去掉on;考查固定用法,表示时间的名词前面有this,that,next,last等词修饰时,前面不加介词.
2.happen改为happened;考查动词的时态,根据上句中的时间状语last week可知此处要用一般过去时.
3.America改为American;考查形容词,这里用形容词形式American作定语修饰名词 tourists.
4.him改为them;考查人称代词,此处人称代词指代American tourists,故用复数them.
5.travel改为travelling;考查分词作定语,college students 与动词travel是主谓关系,故用现在分词形式作后置定语.
6.去掉with;考查介词,be busy doing 是固定搭配,意为"忙于做某事".
7.changes后加that/which;考查关系代词,这是一个定语从句,先行词为the changes,故用关系代词that/which在从句中做主语.
8.had后加a;考查冠词,have a good time是固定短语,意为"玩得很高兴".
9.address改为addresses;考查名词单复数,address是可数名词,根据句意"我们交换电子邮件地址"可知要用复数形式.
10.practicing改为practice;考查动词,不定式符号to后面用动词原形.