It is your choice if you want to buy it or not. The trial version only lasts for a period of time, so if you did want to continue using it, you would have to buy it. You could decide that you did not...
You can download a free trial of MS Office and other MS software from Microsoft's web site. But you cannot ''legally'' download a fully functioning copy anywhere. Office is a rather expensive suite...
You can download the trial version of Microsoft Office for free from the Microsoft Website. See the link provided in the 'related links' below. Note: Microsoft Office is commercial software, and...