Mr Brown likes to be exact（确切的）．One day when he took a walk in the street，a man came up and asked him the way to the bookshop．He said to him，"Cross the bridge（过桥） and turn to the right．"The man asked again，"Is the bridge very long？""Only thirty metres long．" The man thanked him and went to the bridge．Suddenly he heard a man running after him．"Stop！"Mr Brown said to the man．"I'm sorry．I forget the bridge is forty metres long．If you walk thirty metres long and turn to the right，you will fall into the river．"
1．Mr Brown likes going to the bookshop．
2．The bookshop is on the other side of the river．
3．The bridge is forty metres long．
4．Mr Brown ran after the man to tell him how long the bridge is exactly．
5．The man would fall into the river if Mr Brown didn't tell him how long the bridge was．