阅读短文，然后从方框中选出可以填入文中空白处的单词

    suddenly  onto  something  pushed   back  swam  friendly  towards  follow  huge

    Last month, I went to swim in the sea. I really far, past the rocks and out to sea.    Then I saw  moving towards me. It was and grey, with a large fin. It was a shark! I began to swim  , but he beach was too far away. The shark started to swim around me.

    I was really scared, another creature appeared next to me in the water. It was a dolphin! It me away from the shark. I sat on its back as it swam  the beach.

Soon we were near the beach. The shark did not  us. As soon as I stepped the beach, the dolphin swam away. I will always remember how this animal saved my life.