从短文后每小题的三个选项中选出能填入相应空白处的最佳选项。

    It is a cold day1winter. A farmer finds a2on the ground. It is nearly dead with cold. The farmer is a3person. He brings it carefully to his house and puts it near a fire. Soon the snake begins to move, but it raises its head and tries to4the farmer. "Oh!" says the farmer, "I save your life, but you shouldn't thank me like this. You must die the sooner the better." Then he5the snake with a stick.