题目内容：
根据以下材料回答第 1～4 题：Passage Four
It was almost two o’clock．A cold wind had come up over the take．As a black cloud moved across the sun，WaIt，a small boy，looked up．“I smell a storm(暴风雨)”，he thought．
Shorty，a man of forty，had gone into town．He had said he would be back before
tw0．He had told Walt to watch the boats and the shop．There were no people around．
They had all gone out on the lake to fish．
So Walt went to work on one of the boats．From there he could hear the telephone ifit ran9．And he could watch the door．
It was a little after two when the stranger came．Walt saw him stop by the shop．The
stranger looked in for a minute．Then he went down to the boats．He was a big inan in a coat．
Walt called to him，“Do you want something，sir?’’
The stranger looked at Walt and said，“NO，thanks．”Then the stranger moved slow-
ly away．As he went on，be looked at the boats one by one．
Wale sat there with his eyes on the back of the stranger’s coat．He tohought，“I cansmell something as I smell that storm．I hope Shorty comes back soon．”
The story happened ．
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答案解析：