用分词短语将下列句子改为一个简单句

题目

用分词短语将下列句子改为一个简单句
1、She picked up the MP3 which was lost by my classmate.
2、I don't know the girl who is singing in the hall.
3、As soon as he got home,he began to do his homework.
4、She worked hard all day.She felt very tired.

答案

1、She picked up the MP3 lost by my classmate.2、I don't know the girl singing in the hall.3、After getting home,he began to do his homework.4、 Working hard all day,she felt very tired.百分百对!...