Dear Bob:
Thanks writing and introducing your beautiful city to me. Now I'd like to tell you anything about my hometown PingChang, which stand on the bank of the Bahe River.
It is a beautiful city for people to live. Its economy has been developing rapidly in the past 10 years. Now factories, houses and roads have built. More schools and hospitals are serving
Dear Bob:Thanks（加上for) writing and introducing your beautiful city to me. Now I'd like to tell you anything (anything改为something)about my hometown PingChang, which stand(stand改为stands） on the bank of the Bahe River. It is a beautiful city for people to live（加上in）. Its economy has been developing rapidly in the past 10 years....
