Sally was a student. It was going to be her mother's birthday. She wanted to buy (she) a present that would be nice and (use) but not expensive.
She went (shop) after a quick and simple lunch. After she look for half an hour, she found a shop that was selling cheap umbrellas. She thought ,"Mom can carry it when she is wearing clothes of any color. "So she bought a lovely black umbrella and (bring) it to school until her class finished.
On her way home on the train she felt hungry because she had so little for lunch. So she went to the buffet car. She (leave) the umbrella on her seat. But when she got back, it had gone! Sally began to cry. The other passengers(游客) felt very sorry for her and asked what the matter was.
She told them the black umbrella she bought for her mother had gone. After other passengers heard this, they asked her for her (mother) address(地址) so that they could send the umbrella to her if someone took it mistake and brought it back.
And now a week passed. Sally got a letter from her mother. It said, "Thank you very much for your lovely gifts, why do you send me three black（umbrella）?"
