题目内容：

Once a man was walking along a beach. The sun was shining and it was a beautiful day. In the distance he could see a person 1.(go) back and forth between the surf’s edge 2. the beach. As the man approached, he could see there were hundreds of starfish(海星)3. (lie) on the sand as 4. result of the natural action of the tide.

The person seemed to be 5. (absorb) in the apparently useless task. There were  too many starfish. Many of them were sure to die. When he came near, the person continued the task of 6.(pick) the starfish one by one and throwing them into the ocean.

As he came up to the person, he said, “You must be crazy. There are 7.thousand) of miles of beach 8.(cover) with starfish. You can’t 9.(possible) make a difference.” The person looked at the man. He then bent down and picked up one more starfish and threw it back into the ocean. He turned back to the man,10.(say), “It surely makes a difference to that one!”