题目内容：
According to a recent research, the old are more than twice as likely to have a positive attitude to life __________ the young.
A.as B.than C.while D.until
参考答案：
答案解析：
选择题：According to a recent research, the old are more than twice as likely to have...
- 题目分类： 英语学科知识与教学能力
- 题目类型：选择题
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