题目：
Look ! This is a nice 1 .It’s Sunday morning. There 2 many boys and girls in the park. Some of them are singing 3 the tree. Some are 4 in the river. Other 5 are playing games on the hill.
Maria is an American girl. She is 6 to her classmates. She is in the park, too. What is she doing? She is sitting and 7 a book. She 8 _reading very much. Tom is an English boy. He is five. He is too young. He can’t 9 to school. Now he 10 a kite with his father in the park.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D解析：骨髓增生异常综合征病人的骨髓幼稚细胞中有Auer小体见于RAEB－T型，其余各型都不出现。
