[填空题]It’s difficult to imagine the sea ever running out of fish. It’s sovast, sodeep, so (36) . Unfortunately, it’s not bottomless. Over fishing, (37) with destructive fishing practices, is killing off the fish and (38) their environment.
Destroy the fish, and you destroy the fishermen’ s means of living. At least 60 (39) of the world’s commercially important fish (40) are already over fished, or fished to the limit. As a result, governments have had to close down some areas of sea to commercial fishing.
Big, high-tech fleets (41) that everything in their path is pulled out of water. Anything too small, or the wrong thing, is thrown back either dead or dying. That’s an (42) more than 20 (43) metric tons every year. (44) .
In some parts of the world, for every kilogram of prawns (对虾)caught, up to 15 kilograms of unsuspecting fish and other marine wildlife die, simply for being in the wrong

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Destroy the fish, and you destroy the fishermen’s means of living. At least 60 {{U}} (39) {{/U}} of the world’s commercially important fish {{U}} (40) {{/U}} are already over-fished, or fished to the limit. As a result, governments have had to close down some areas of sea to {{U}} (41) {{/U}} fishing.
Big, high-tech fleets {{U}} (42) {{/U}} that everything in their path is pulled out of the water. Anything too small, or the wrong thing, is thrown back either dead or dying. That’s an {{U}} (43) {{/U}} of more than 20 million metric tons every year.
When you consider that equals a quarter of the world catch, you begin to see the size of the problem