1.The girl is too young ,and she can't do such hard work.（改为同义句）
2.He has _fifteen_ bikes to fix up.（对画线部分填空）
3.I don't have any more of it.(改为同义句）
4.This volunteer work takes her several hours a week （改为同义句）
She —— several hours a week —— this volunteer work.
5.He told his teacher about his problems.（改为否定句）
6.You mustn't fight back.（改为祈使句）
7.All the people in the room laughed at him because of his new hairstyle.(改为被动句)
8.I feel like going for a walk this afternoon.(改为同义句)
9.I prefer to watch news rather than TV plays.（改为同义句）