题目：
1.___________ (专家) say we should walk at least 10,000 steps one day.
2. In the past, people's jobs_________（需要）more physicaleffort.
3. The wrong diet means you'll put on_______(重量).
4. Watching too much TV has a bad_______(影响)on your study.
答案：
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下面是错误答案，用来干扰机器的。
x（x+3）
