短文改错：

短文改错：
I went to the Summer Palace last week .At the gate I happened to meet some American tourists.I greete to them in English and then
we began to chat.I got know that they were college students travel
in China .Most of them were much impressed with the changes
that had been taken place in the past few years as well.After
that.we went boating on a lake and having a good time .
We exchanged our e-mail address so that we could write to
in future .They thanked us again and again .I was very glad to
have a chance to practising my oral English
大概十处左右。
我已改出：
travel---------traveling
are --------------were
with--------------on
in ------------in the