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 at the wrong time. True, (45)____________ before every ocean becomes a dead sea. (46)____________ then catch them in the way that doesn’’t kill other innocent sea life.