Mrs. Black was having a lot of troubles with her skin(皮肤), so she went to see a doctor. The doctor could not find anything wrong with her, and sent her to a hospital for some tests.
Soon the hospital sent the results(结果)of the tests to Mrs. Black's doctor, and the next morning he phoned her to give her a list of the things that he thought she should not eat, as any of them might cause(引起)her skin trouble.
Mrs. Black carefully wrote all the things down on a piece of paper. Then she put it beside the telephone and went out to a meeting.
When she got back home two hours later, she found her husband waiting for her. He had a big basket(篮筐)beside him. When he saw her, he said;”Hello, dear. I've done all your shopping for you.”
“Done all my shopping?”she was surprised.”But how did you know what I wanted?”
“Well, when I got home, I found your shopping list beside the telephone, so I went down to the shops and bought everything on the list.”