Lesson 3 视频my computer and mouse（科普版）.swf
Lesson 3 A computer has a keyboard 课件.pptx
课件14张PPT。 Presentationmouth hand lettertallscreenkeyboard mouseS：I have a pen.
S：He has a pen.
S：I have a ruler. → Do you have a ruler?
Yes, I do./No, I don’t.
T: He has a ruler. → Does he have a...