Big ocean(海洋) fish have almost disappeared from the world si

Big ocean(海洋) fish have almost disappeared from the world since the start of business fishing in the 1950’s.The scientists found that the number of large fish has dropped by 90 percent in the past fifty years.The study took ten years.The researchers collected records from fishing businesses and governments around the world.The magazine Nature published the findings.
The scientists say the common way called longline fishing is especially harmful to large fish.This way includes many fishing lines that are connected to one boat.If these lines are joined together,they can reach one hundred kilometers.They hold thousands of sharp metal hooks to catch fish.Longline fishing is especially common in the Japanese fishing industry.Records showed that Japanese boats used to catch about ten fish for every one hundred hooks.The study says longline fishing boats now might catch one fish per hundred hooks.
The scientists say business fishing can destroy groups of fish much faster than in the past.The study suggests that large fish can disappear almost completely from new fishing areas within ten to fifteen years.Ocean life systems could be destroyed
It’s not the only worry that the number of large fish is becoming smaller and smaller.What’s worse,they are smaller in size than their ancestors(祖先).
66.The underlined word published in the first paragraph means _________________.
A.发表 B.发现 C.研究 D.调查
67.The number of big ocean fish has become smaller because ______________.
A.the oceans are polluted B.the ways of fishing go into practice
C.the scientists pay little attention to them D.Japanese fishing boats catch one fish per hundred hooks
68.What do you think of business fishing?
A.It should be encouraged.B.It can balance ocean life systems.
C.It needn’t be cared about.D.It may bring much harm to ocean fish.
69.Where is the passage probably taken from?
A.A story book.B.A fashion magazine.
C.An environmental report.D.A sports newspaper.
70.Which of the following can be the best title for the passage?
A.Longline fishing.B.Japanese fishing industry.
C.Modern fishing ways.D.Worrying situation of big ocean fish.

66A
研究 调查 发现 是一个意思,发现注重研究调查的结果,而研究调查注重过程
他们交给科学家去研究、调查发现.发表的事情交给自然杂志
67D
Longline fishing is especially common in the Japanese fishing industry
我觉得这句是关键啊
其它都没提到
68D
ABC是一个意思
第三段第一句话就是答案
69C
这个只能排除法,看哪个更合适
因为题目问的是哪种情况更加可能啊
A故事书B时尚杂志C环境报告D体育报纸
70D
A和B是概括第二段内容的,其它3段都没提到
C是讲现代捕鱼方式,是片面的,现代捕鱼方式只讲了Longline fishing一种
D才是最合适的,
最后一段就是总结回归主题,第2、第3段是为了反映 big ocean fish的环境恶劣,这个说的通吧