Tom is _______ honest boy. We all believe what he says.

— I think English is __________ unimportant subject.— I don’t think so. It is __________ useful tool when we talk with foreigners.

---This is         useful machine which was made in ________thirteenth century 

--Is this  _______ pencil case?  --No, it’s ______ eraser．

— Have you seen _____ empty box?— Do you mean _____ box you showed to me yesterday? I put it in your schoolbag.