听力题 It''s difficult to imagine the sea ever running out of fish. It''s so vast, so deep, and so (36) 1. Unfortunately, it''s not bottomless. Over-fishing, (37) 2with destructive fishing practices, is killing off the fish and (28 ) 3their environment. Destroy the fish, and you destroy the fishermen''s means of living. At least 60 percent of the (39) 4 commercially important fish (40) 5are already over-fished or fished to the limit. As a result, governments have to close down some areas of sea to commercial fishing. Big, high-tech fleets (41) 6that everything in their path is pulled out of water. Anything too small, or the wrong thing is thrown back, either (42) 7or dying. That''s an (43) 8 of more than 20 million metric tons every year. (44) 9. In some part of the world, for every kilograms of prawns caught, up to fifteen kilograms of unsuspecting fish and other marine wildlife die, simply for being in the wrong place at the wrong time. True, (45) 10 before every ocean becomes a sea. (46) 11 then catch them in the way that doesn''t kill other innocent sea life.