完形填空

　　It was late 　　1　　 when an old man came to a small town．He found an inn(小酒店)and wanted to stay there for the night．After he 　　2　　 the room, the owner said to his wife,“Look at his bag．There must be 　　3　　 money in it．Let’s 　　4　　 when he’s asleep, 　　5　　?”

　　“No, no,”the woman said,“he must look 　　6　　 his bag tomorrow morning．If he can’t find it, he’ll telephone the police．”

　　They thought for 　　7　　 minutes．Then the woman had an idea,“We have forgetful(健忘的)grass．Why 　　8　　 some forgetful grass into his food?If he 　　9　　 the food, he will forget 　　10　　 his bag away．”

　　The old man had the food 　　11　　 the forgetful grass and went to bed．The next morning, when the owner of the inn got up, he found the door 　　12　　 and the old man had left with his bag．He woke his wife up and said to her 　　13　　,“What a fool(傻瓜)！Your forgetful grass isn’t 　　14　　 at all．”

　　“No, I don’t think so．He must forget something．”His wife said．

　　“Oh!I remember now!”the man cried out suddenly,“He forgot to 　　15　　 for the night．”