缺词填空：

Here's the story about Ming's life on the waters．Ming has lived all his life on a wide r　　1　　 in China．His home is a large house-boat with a roof, one of hundreds that move up and down．In about six years he has not once been on l　　2　　 , but he is never lonely．He is a strong swimmer．In fact(实际上), he could swim before he could walk．When he wants to play with his f　　3　　 , he just swims across to their boats or asks them to v　　4　　 him．

Ming's father is a fisherman but he never u　　5　　 a line or a net(网)．Great black birds called cormorants(鸬鹚)do the fishing for him．Rings(圈)have been put around the birds’ n　　6　　 so that they cannot eat the fish they catch．They have been taught to b　　7　　 the fish to people．And then people reward(奖励)them with a fine big fish as soon as their work is f　　8　　．Ming loves watching the cormorants, but better still he likes going s　　9　　 with his mother．The shops, of course, are boats very like his o　　10　　．