阅读下列短文，从每小题的三个选项中选出最佳选项。

B

It is sunny and hot. A bird is thirsty. He wants to have some water. Then he can see a bottle. But the bottle is tall and thin. He can't drink the water. He's sad. He can see some little stones. And he has a good idea. He puts(~k) some little stones in the bottle. Look! He can drink the water now. He is not thirsty. He is happy.