4．
阅读短文，判断正误。 This morning, there is a strong wind and heavy rain in Shanghai. In the park, many trees are blown down. In the afternoon, we go to the park to do some cleaning. Our teacher gives us some advice to clear away the fallen trees, branches and leaves. Then we begin our work. After an hour, we are working hard when it begins to rain again. It rains heavily. We don't take any umbrellas or raincoats. The rain lasts two hours. And we have to stop our work.
