阅读理解。 It was Mary's birthday. She received a letter from her uncle. 'Dear Mary,' he wrote in the letter, 'Happy birthday. I'm sending you some chickens. They will arrive tomorrow. I hope you'll like them. Uncle Toby. ' Mary was very pleased. She liked eating eggs and chicken. 'I can keep the chickens for their eggs or eat them. ' she thought. When the chickens arrived the next day, they were put in a box. Mary was very happy. She took the box off the truck and began to carry it into her garden, but the box of chickens was so heavy that she dropped it. The box fell on the ground and broke. The chickens all ran out. They ran here and there. Mary spent hours in trying to find them. A few days later her uncle came. He asked, ' Did the chickens arrive safely?' 'Yes, but I dropped the box. It broke open and chickens ran everywhere. It took me the whole morning to look for them. ' Mary said. 'Did you find them all?' asked her uncle. 'I hope so,' Mary answered, 'but I only caught eleven of them. ' 'That's very interesting. I only sent you six. ' Her uncle said with a smile. 1. Mary received a letter from her A. aunt B. uncle C. grandfather D. friend 2. When she received her present, Mary was . A. happy B. sad C. worried D. unhappy 3. Mary dropped the box because . A. she didn't like the present B. the box was too heavy C. she wanted to break the box D. she couldn't wait to look at her present 4. It took her _ to find the chickens. A. an hour B. two hours C. three hours D. the whole morning 5. Did Mary know how many chickens her uncle sent her? A. Yes, she did. B. Yes, she can. C. No, she can't. D. No, she didn't.