2015-2016学年人教版 选修七 unit 5 Travelling abroad 课件(59张)
2015-2016学年人教版 选修七 unit 5 Travelling abroad 课件(59张)第2页

4.________ vi.when a dog barks, it makes a short loud sound or series of sounds 5.________ adj.possible but not necessary; left to personal choice

6.________ n.a person or company that represents another person or company, especially in business 7.________ adj.two lines, paths etc that are parallel to each other are the same distance apart along their whole length

parallel 

bark

optional 

agent