中国古代哲人荀子说：“天行有常，不为尧存，不为桀亡。”这是一种（  ）

A．宿命论观点

B．唯意志论观点

C．机械唯物论观点

D．朴素唯物论观点

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.