Obesity is a condition perpetuated by a diversity of factors.

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问题 Obesity is a condition perpetuated by a diversity of factors.

选项 A、caused
B、sustained
C、modulated
D、modified

答案B

解析 划线词perpetuate的意思是:使永久/长期存在、持续存在,所以此题强调的是“很多因素使肥胖症问题长期、持续存在。”只有选项B.sustain(持续存在)有此含义,因此正确答案为B。
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