阅读理解。

It was a cloudy summer afternoon. Lily and her friends were in the park. Suddenly there was a strong wind and then it rained. The children ran to a big tree. They were under it. They felt afraid. Then a guard（管理员）ran to them. He had some umbrellas in his hand. "You shouldn't stay under the tree！Here are the umbrellas. Go to that house. Come on, boys and girls!" The children went to the house under the umbrellas. In the room, they looked out of the window. “It's raining cats and dogs!" Lily said. "Yes, what a heavy rain!”Dona said. Suddenly there was a bright white-light. The light hit（击中）the big tree. After a loud"Bang", that big tree fell on the ground.

The children said, "We can't stay under the trees on rainy days. It's very dangerous. ”