____ ，随着社会的巨大变化，人们的服饰也发生了很大变化。

在中，已知于，则长为（   ）

    Rose is a student from the U. S. She is in Shanghai with her parents now. She doesn't know Chinese, but she is trying to study and speak it. She often tries to speak Chinese with her Chinese friends. Sometimes they don't understand her, because she can't speak Chinese well.

    It's Saturday morning. Rose goes out. She is on her way to the park. She is going there to see a flower fair(展销会). But she doesn't know how to get there. She asks a Chinese boy the way. The boy can't understand her. Then she takes out a pen and a piece of paper. She draws flowers on it, and then gives the picture to the boy and says something about it. The boy smiles and then shows Rose the way to the park.