A Frenchman (法国人) once came (来，出现) to London to study. He lived at his friend’s home. He worked very hard (41) his lessons.
Every morning, he often (42) reading by the window. His friend, John, liked to keep birds. One morning when be took out his birdcage (鸟笼) and tried (43) it on the window upstairs, the cage (笼子) fell (落下；下降) (44) his hand. He couldn’t catch it, so he shouted, "Look out!" As (45) as he heard the shout, the Frenchman put his head (46) the window to look at (47) was happening. What happened (48) was just in time to hit (碰撞,击打) him on the head! From (49) on the Frenchman knew what the English "Look out !" really (50) .