(单选题)

The main idea of the passage may be best expressed as ______.

A.Varidesk transform business from office into the classroom

B.the problem of childhood obesity admits of delay

C.standing up at school may increase productivity

D.US furniture company offers standing options for students

参考答案：D

参考解析：

主旨大意题。A项意为“Varidesk公司把办公室变成了教室”；B项意为“儿童肥胖问题承认延迟”；C项意为“在学校站立学习可以提高效率”；US furniture company offers standing options for students意为“美国家具公司为学生提供站立式选择”。结合全文内容可知，此处主要讲述站立式课桌在美国由小隔间和角落办公室扩展到教室。故选D。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语