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    Our school is in Beijing. It isn't very big but it is very beautiful. There are a lot of trees in it. I'm in Class Two, Grade Seven. The walls of our classroom are white. There is a blackboard and some pictures on the wall. Our classroom is very clean （干净的）. There are 45 students in my class. Mr. White is our English teacher. He is from England. I like English very much. Mr. White is very friendly to us. He likes China and he is learning（学习）Chinese now. He can speak some Chinese. My father and mother are English teacher too. They often help me with my English. My classmates are very friendly. We are all friends. We love our school.

朗读课文《小树死因调查报告》1、2自然段，思考：作者写调查报告的原因是什么？

下列关于细菌和真菌的说法，正确的是（　　）

1851年5月，第一届世界博览会在英国举行。来自世界25个国家的商界、政界代表人物汇集到伦敦水晶宫。这是一次规模空前的聚会，人们相聚目的是为了展示进步和繁荣。当时的中国人把它翻译为“炫奇会”。在这次“炫奇会”上．人们能够看到

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