The keeper tells the visitors （not touch）the tigers．It's very dangerous．
When you visit New York， don't miss Broadway． It has been famous for its theaters since the early century． （twenty）
As I was trying to find my way out， I suddenly some noise． （hear）
It's late autumn now． The tree has lost all of leaves． （it）
﹣What's your plan after the exam？
﹣We are going to take a flight to Chengdu when the exam is over． （direct）
People who are warm﹣hearted set good examples to society because they pass on their to people around them． （kind）