Bob was cutting a branch（树枝） off a tree in his garden. While he was sawing（锯）, another man passed in the street. He stopped and said, “ Excuse me, but if you continue (继续)to saw（锯） that branch like that, you will fall down with it.” He said this because Bob was sitting on the branch and cutting it at a place between himself and the trunk（树干） of the tree.
   Bob said nothing. He thought, “ This is some foolish（愚笨的） person who has no work to do and goes about telling other people what to do and what not to do.”
   The man continued on his way. Of course, after a few minutes. The branch fell and Bob fell with it.
   “My God!” he cried. “That man knows the future!” and he ran after him to ask how long he was going to live. But the man had gone.

____

①请你用四个词语概括出整个故事的情节：____—____—____—____

②本文重点了武松____和____这两个故事情节，分别可以看出武松____和____的性格特点。

小林总是抱怨：“上中学后，作业多，考试多，成绩还没有小学时好，学习真是太苦了！”下列想法中不能帮助小林改变这种消极态度的是（    ）