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人類). It is easy to tell from(區(qū)別) crows sounds whether they are pleased or angry. Perhaps crows talk a lot because they are friendly birds. A pair of crows will live together all their lives, and if one of them dies, the other one bees very sad and quiet for the rest of its life and sometimes it dies, too. 26. A crow is inches long. A. about twenty B. thirty C. ten D. less than twenty 27. Why are crows dirty? A. They are black all over the body. B. They like to eat dirty food. C. They usually talk. D. They don39。t have baths. 28. Crows are always . A. hungry B. pleased C. sad D. kind 29. Why are crows more useful to us than any other bird? A. They are usually noisy. B. They are usually dirty. C. They are flying in large numbers. D. They eat a lot of waste food. 30. You can tell from crows39。sounds . A. whether they are hungry or full B. whether they are pleased or angry C. whether they are ill or healthy D. whether they are living or dead. (B) Tom and Kate are brother and sister. They like music. Kate can play the piano. But she can39。t play the violin. Tom can39。t play the piano, but he can play the violin. Today they want to carry a piano into Kate39。s bedroom. The piano is big. They can39。t carry it. Kate and Tom39。s parents aren39。t at home. They can39。t help them to carry the piano. But they have two cousin sisters here today. They ask them to help. 31. Tom and Kate are . A. twins B. brothers C. brother and sister D. sisters 32. What can Kate play? A. The piano. B. The violin. C. The flute(笛子). D. The guitar. 33. Who can play the violin? A. Tom. B. Kate. C. Their cousin sisters. D. Their parents. 34. Why don39。t their parents help them to carry the piano? A. Because it39。s big. B. Because they are old. C. Because they39。re at home. D. Because they aren39。t at home. 35. Who help them to carry the piano? A. Their parents. B. Their cousin sisters. C. Their clas