完形填空。 It was very late at night. An old man came to a small town. He found an inn (小旅馆) and wanted to stay there for the night. After he went to his room, the owner said to his 1 .'Look at his bag. There must be much money in it. Let's take it away when he's 2 , shall we?' 'Oh, no,' said the woman.'He must 3 his bag when he wakes up tomorrow morning. If he can't find it, he'll telephone the police.' They thought for a few minutes. Then the woman had an 4 .'We have forgetful grass. Why not put some forgetful grass into his food? If he 5 the food, he will forget to take his bag away.'The old man ate the food 6 the forgetful grass and went to bed. The next morning when the owner got up, he found the door 7 and the old man had gone away with his bag. He woke his wife up and said to her angrily, 'How foolish you are! Your forgetful grass isn't 8 at all.' 'No, I don't think so. He must forget 9 ,' his wife said. 'Oh! I remember now! He forgot to 10 for the night,' cried out the man suddenly. Then they looked at each other without saying a word. (     )1. A. sister (     )2. A. asleep (     )3. A. set off (     )4. A. idea (     )5. A. eats (     )6. A. onto (     )7. A. open (     )8. A. interesting (     )9. A. anything (     )10. A. spend B. friend B. awake B. give up B. advice B. receives B. for B. opens B. important B. nothing B. cost C. aunt C. alive C. look for C. instruction C. likes C. with C. opening C. delicious C. something C. take D. wife D. alone D. take off D. excuse D. refuses D. into D. to open D. useful D. everything D. pay