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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.

下面是四地气温曲线和降水量柱状图。读图，回答下列问题：

庆祝中秋节

    It is the Mid—Autumn Day today. My grandmother, parents and neighbours are celebrating the festival together. We are eating delicious moon cakes in the garden. And we are enjoying the beautiful round moon. We are also drinking Chinese tea. We are very happy.

已知A∩B=B，且A={x|$\frac{x-5}{2}<-1$}，若C_AB={x|x+4<-x}，则集合B=（  ）