dentist n.牙醫;impossible adj.不可能的;pull out a tooth(動詞結構)拔掉一顆牙;cotton wool 藥棉;collect vt.收集;match box火柴盒;collection n.收集,收藏;grow v.成長,增長;in answer to one’s question作為對某人問題的回答;nod v.點頭;make strange noises(動詞結構)弄出奇怪的聲響;meanwhile adv.與此同時;tongue n.舌頭;be busy doing sth.忙著做某事;search out 動詞短語)搜出;hole n.洞;remove vt.移開,去除;pull out the wrong tooth拔錯牙