There are also many types of fish that are good for you, but arc in danger of being wiped out because of ovcrfishing. Sonic are being fished in the wild so much that they cannot reproduce enough to survive.Others re being farmed in ways that are not environmentally friendly. These fish include red snapper.Atlantic salmon, bluefnn tuna. and king crab.

　　Despite these problems, there are several fish that are both healthy and sustainable (可持续的), such as Alaskan salmon, American catfish, Pacific cod, and several fans-raised fish and shellfish.

　　43. Which of the following is true of PCBs according to the text?

　　A. They are transported by human beings around the globe.

　　B. They have been widely used in &c world since 1977.

　　C. They are hard to be cleared out from nature.

　　D. They arc a kind of man-made fish food.

　　44. What does "end up in fish" in Paragraph 3 mean?

　　A. To be absorbed by fish.

　　B. To disappear in fish.

　　C. To bring fish to an end.

　　D. To be the last food of fish.

　　45.What is the condition of rcd snapper?

　　A. It cannot reproduce enough to survive.

　　B. It has burn wiped out b xause of ovcrfishing,

　　'

　　C. It is raised in ways harmful to the environment.

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