1. They made up another excuse.<br/><br/>2. They made up <span style="color:#ff0000;"><b>yet</b></span> an excuse.<br/><br/>3. They made up a <b><span style="color:#ff0000;">yet</span></b> excuse.<br/><br/><br/>4. They made up <span style="color:#ff0000;"><b>yet</b></span> another excuse.<br/><br/>Which of these are correct English?