26.What is happening to everyone in the world at the same time?
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27.A man wanted to buy the slowest boat made in Hong Kong.He advertised for it. Three boat-owners came to sell their boats. He wanted the three boat-owners to race their boats across the harbour and back.He said he would buy the last boat to arrive.After one day none of the boats had returned. What was the man’s mistake? What should he do?
28.A train was travelling north， where it stopped at a railway station. The railway line was very straight—it had no bends， and trains couldn’t leave it or turn round. But five minutes after the train started again， it was 1km south of the station. Why?
A.The train went backwards.
B.The train was knocked off by another train.
C.The passengers got off the train.
D.The driver made a mistake.
29.Tom lives on the sixth floor of building. He goes three floors up to see his friend. After that he goes five floors below to see another friend. On what floor is he now?
30.I have cities but no houses= forests but no trees= rivers without water=what am I?
答案：
26. Growing old.27. He should ask each boat-owner to race one of the other boats. Each man would then go as fast as possible to show that this own boat was the fastest.28. A. 29. The fourth floor. 推理中含有计算,即由三层下到一层,再由一层上到四层,共走了五层,均在他住的六层之下。30. A map.
