A rich American went to Paris and bought a picture painted by a French artist. The American thought the picture to be very fine because he 1a lot of money for it. When he came to his hotel he wanted to hang the2up on the wall. He 3it for a long time, but couldn't4 which was the top and which was the bottom(底部) .The American5the picture this way and 6, but still couldn't 7.

So he had8. He 9 the picture in the dining room and invited the painter of the picture to 10. When the painter came, the American said11to him about the picture.12 they went into the dining room to have dinner. He looked 13 at the picture several times. Then he put on his 14and looked at the picture again and again. At last he  15 that the picture was up side down.