四年级英语下册Lesson 1Look !Its a watch.Whose watch is it?I think its that mans watch.Excuse me.Is this your watch?Oh ,Yes .Its my watch.Here you are!Thank you very much.You re welcome.Lesson2What colour are the trousers?(B=Bill M=Mum)B: Hi ,Mum !We have a new uniform for this term.M: Really ?Whats it like?B: A shirt and a pair of trousers.M: What colour is the shirt?B: It s white.M: Thats nice . What colour are the trousers?B: They re blue.M: