BobbyandSam,sam和bobby

苏教版译林牛津版五年级英语unit2 a new student第三
why does bobby laugh at sam? read the story and try to explain.
英语 译林英语五年级上册unit6 my e-friend课件ppt bobby and sam
our friends bobby and sam went to fashion show too.
时装秀 read and answer : what did bobby and sam wear