阅读理解。 Once upon a time, there were three tortoises who were friends. One of them was a large tortoise (乌龟), one was a medium-sized tortoise and the third was a small tortoise. One day they went into a restaurant and ordered some cake. While they were waiting for the cake, they remembered that they hadn't brought any money. 'Hey, we forgot to bring money to pay for our cake,' the big tortoise said. 'The little tortoise can go home and get it,' the medium-sized tortoise said. 'He's the youngest, so he should be the one to go.' The little tortoise wasn't very pleased at this, but he knew he shouldn't argue (争吵) with his elders, so he said, 'All right, I'll go. But you must promise not to eat my cake while I'm away.' The large tortoise and the medium-sized tortoise agreed, and the little tortoise set off for home to get some money. A few days later, the big tortoise said to the medium-sized tortoise, 'Let's eat the little tortoise's cake. I'm hungry again.' 'So am I,' the medium-sized tortoise said, and reached for the cake. As she did so, the little tortoise shouted from near the door of the restaurant, 'If you touch my cake, I won't go and get the money!' 1. The three tortoises _____. [     ] A. didn't know each other B. knew each other C. lived in a restaurant D. were very poor 2. The three tortoises found they didn't take money with them _____. [     ] A. when they were ordering the cake B. after they ate up the cake C. before they went into the restaurant D. after they ordered the cake The little tortoise _____. [     ] A. didn't mind getting the money B. couldn't find the money C. wanted to share his cake D. agreed to get the money 4. The little tortoise _____. [     ] A. didn't go very far after a few days B. came back very quickly C. had some money with him D. believed in the other two tortoises 5. The two elders decided to eat the little tortoise's cake because _____. [     ] A. they felt hungry again B. they wanted to leave at last C. the cake was so nice to eat D. they were angry with the little tortoise