He is quite well now, <i>____</i> .<br/><br/>a) except for a slight cold<br/>b) except a slight cold<br/>c) except have a slight cold<br/>d) expecting a slight cold<br/><br/>Answer is (a) according to my book. I don't understand why (a) is chosen. Can't we choose (b)? <br/><br/>Also, I don't understand why 'for' is used here.<br/><br/>What is the difference between (a) ,(b) and (c)?<br/><br/>please advise.