it is obsolete it is obtained it is obvious it is obvious you it is obviously it is obviously not it is occasionally it is occupied it is october it is odd it is of course it is of course possible it is of crucial importance it is of fundamental importance it is of great it is of great importance it is of high it is of interest it is of little it is of no consequence it is of no use it is of paramount importance it is of particular it is of particular importance it is of the utmost it is of utmost it is of utmost importance it is of vital importance it is off it is offensive it is offered it is offering it is official it is officially it is often it is often accompanied it is often also it is often called it is often cited it is often combined it is often considered it is often described it is often difficult it is often easier it is often forgotten it is often hard it is often known it is often mistaken it is often necessary it is often not it is often overlooked it is often possible it is often referred it is often said it is often seen it is often the case it is often thought it is often used it is often useful it is ok it is okay it is okay if you it is old it is older it is omitted it is on display it is on earth it is on me it is on my list it is on sale it is on the ground it is on the internet it is on the list it is on the right it is on the road it is on the way it is on this basis it is on us it is on you it is once it is once again it is one it is one more it is one thing it is one way it is ongoing it is online it is only it is only a matter it is only a question it is only a short it is only allowed it is only available it is only fair it is only found it is only god it is only good it is only just it is only logical