D
How do you feel about going fishing? 36. All you need to do is sitting by the river and waiting. In fact, going fishing can be dangerous(危险的). 37.
First, go fishing in a safe place. There must be some animals or insects(昆虫)near the river or under the water. 38. So please make sure that fishing there is safe. You can check the information who went there before on the phone.
Second, go fishing at the right time. 39. Also, never go fishing when there is lightning(闪电). The rod(钓竿)can bring the lightning to your body.
Third, go fishing with responsible(可信赖的)friends. 40. Also, they are careful. They never go near dangerous places or take part in dangerous activities.
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使文章意思通顺、内容完整。
A. They may bring safety problems.
B. It is too hot at noon and too dark at night.
C. Follow these tips and you can keep safe while fishing.
D. When you meet problems, they can help you solve them and protect you.
E. Many people think it is very safe.

36.E；37.C；38.A；39.B；40.D

36. 根据后文“In fact, going fishing can be dangerous(危险的).”可知，前文应是人们对钓鱼的错误认知，认为它很安全，对应选项E。
37. 前文提到钓鱼可能有危险，后文紧接着给出了三条安全建议，此处应是引出这些建议的句子，对应选项C。
38. 前文提到河边或水下有动物或昆虫，后文说要确保钓鱼的地方安全，说明这些动物或昆虫会带来安全问题，对应选项A。
39. 本段主题是“go fishing at the right time”，选项B提到中午太热、晚上太黑，属于不合适的钓鱼时间，符合语境。
40. 本段主题是和可信赖的朋友一起钓鱼，选项D说明朋友能在遇到问题时帮忙解决和保护你，符合语境。