[填空题] It’’s difficult to imagine the sea ever running out of fish. It’’s so vast, so deep, and so (36)______. Unfortunately, it’’s not bottomless. Over-fishing, (37)______with destructive fishing practices, is killing off the fish and (28 )______their environment. Destroy the fish, and you destroy the fishermen’’s means of living. At least 60 percent of the (39)______ commercially important fish (40)______are 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)______that everything in their path is pulled out of water. Anything too small, or the wrong thing is thrown back, either (42)______or dying. That’’s an (43)______ of more than 20 million metric tons every year. (44)____________. 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