论述玉米缺锌的主要症状？

Mary is an American schoolgirl.               小题1:                 . She doesn’t know Chinese, but she is trying to study and speak it.               小题2:         . Sometimes they don’t understand her, because she can’t speak Chinese well.
It’s Saturday morning. Mary goes out. She is on her way to the park. She is going there to see a flower show（展览）.                小题3:                 . She asks a Chinese boy. The boy can’t understand her.                 小题4:                . She draws flowers on it, gives the picture to the boy and says something about it. The boy smiles and then shows Mary the way to the park

A. Then she takes out a pen and some paper. B. She is now in Beijing with her parents. C. She speaks Chinese very well. D. She often tries to speak Chinese to her Chinese friends. E. But she doesn’t know how to get there.