试题题干
The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.
A report concluded that normal children aged between 9 and 17 exhibit a higher level of anxiety today children who were treated for mental illness 60 years ago. The report cited two main reasons: increasing physical isolation—brought on by high divorce rates and less involvement in community—and a growing perception that the world is a more dangerous place.
The （） of a higher level of anxiety today.
参考答案
正确答案：
试题解析
本段主要讲述的是现如今孩子们高度焦虑的原因，—份报告表明，如今9至17岁的孩子们较60年前 患有精神疾病的孩子们表现出更高的焦虑程度。报告列举了两个主要原因：与物质世界的日益隔离以及认为世界是一个危险的地方这种现念的日益深入。而前者产生的原因是较高的离婚率和与社会的脱离。causes 原因，理由。