why dose time fly?

why dose time fly? why does time fly Why does time fly? 脑筋急转弯：1.Why does time fly? 为什么时光流逝?why does time fly? 脑筋急转弯 Why does time fly? 英语脑筋急转弯:Why does time fly?(时间为何飞逝) 英语脑筋急转弯__(WHY DOES TIME FLY?) 英语脑筋急转弯答案：how many sides does a house have why does time fly time flies how time fly fly in the time How time flies(fly)!