One day Mr Brown sees a young woman in the street with children.  He is very surprised all the children are wearing the same clothes. White caps, blue coats and yellow trousers.

    "Are all these children yours?" he asks the woman.

    "Yes, they are," she answers.

    "Do you always  them in the same clothes?" asks Mr Brown.

    "Yes," answers the mother. "When we have four children, we dress them in the same clothes because we don't want to lose any of them. It isto see our children among other children because they are all wearing the same clothes. And now we have ten we dress them like this because we don't want to take other children home  mistake. When there are other children among ours, it is easy to see them because their clothes are different. "

the post office just theScience Museum?

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    Mr Williams, who was always a very c driver, was driving home from work one evening when he came to a crossroad.  It had a "SLOW" sign.  He slowed d  when he came to the main road, looked both ways to see that nwas coming, and then drove across without stopping completely.

    At o he beard a police whistle(口哨声), so he pulled into the side of the road and stopped. A policeman walked over to him with a notebook and a pen in his hand and said, "You didn't stop at that c ."

    "But the sign there doesn't say 'STOPS,'' answered Mr Williams. "It j

says 'SLOW', and I did go slow. "

    The policeman looked around him, and a look of surprise came over his f .

    Then he put his notebook and pen away, scratched(抓) his head and said, "Well, I'm in the wrong street !"