<i>1. <a href='http://endic.naver.com/popManager.nhn?m=search&query=john' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=john</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=yawn' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=yawn</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=and' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=and</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=scratch' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=scratch</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=his' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=his</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=chin' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=chin</a></i>.<br/><br/><i>2. </i> <i></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=and' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=and</a></i> <i></i> <u>at</u> <i></i> <i></i>.<br/><br/>Can I say No.2? If so, how 1 and 2 different?<br/><br/><i>3. <a href='http://endic.naver.com/popManager.nhn?m=search&query=she' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=she</a></i> <i></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=at' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=at</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=the' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=the</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=insect' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=insect</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=bite%20on' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=bite%20on</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=her' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=her</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=arm' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=arm</a></i>.<br/><br/><i>4. </i> <i></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=the' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=the</a></i> <i></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=bite%20on' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=bite%20on</a></i> <i><a href='http://endic.naver.com/popManager.nhn?m=search&query=her' target='_blank' rel='nofollow'>http://endic.naver.com/popManager.nhn?m=search&query=her</a></i> <i></i>.<br/><br/>Can I say No.3 without 'at' like No.4?