Which would you say? and do all work?<br/><br/><span style="color:rgb(11,12,11);">1 Although/even though/even if she does have a nice face, she has a bad personality.</span><br/><br/><font color="#0B0C0B">2 The detectives followed up a case on/of the missing child.</font><br/><font color="#0B0C0B">2 The detectives followed up on a case on/of the missing child.</font><br/><br/><font color="#0B0C0B">THank you</font>