系统解析:细节题。根据文章3-6段Suddenly, everything went quiet ," "I look down into the water and noticed a dark shadow under my board I knew instantly it was a shark."As Syb watched in horror, the five-metre shark put hundreds of sharp teeth onto Hannah's right leg,throwing her from her board, "I was attached to my leg-rope as the shark stared to pull me under the water",She shakes, "I was lying on my back with one leg under the shark's body and the other still in its jaws."Syb desperately punched (猛击)the shark's nose and reached out to grab Hannah as the monster bit a huge chunk(大块)from the surfboard, "I was still attached to my board and was dragged back under the water again,"she says ,When she came up for air, Hannah dog paddled(爬泳)to Syb's board and he dragged her from the water to lie on his back 可知B项的顺序是正确的。