Unit 2 please touch your head,hair,ear,mouth,nose,eye,head,hand,foot,leg,arm,Practise:,Ask and answer: Whats this?,Touch your body,eyes,ears,hands,arms,legs,feet,Whats this ? Its a hand. What are these? They are hands. Whats this? Its an arm. What are these? They are arms. Whats this? Its an eye. What are these? They are eyes. Whats this ? Its a foot. What are these? They are feet.,Whats this ? Its a/an 这是什么？这是、 What are these? They are 这些是什么？这些是、,What is this ? It is a/an What are these? They are ,an arm /an ear/ an eye/a head /a hand/a nose/a foot,arms/ears/eyes/heads/hands /noses/feet,hair ?,下列哪些单词前加a,哪些加an: apple ,bag,book,orange,map,