1.this is a ruler2.I have here a large ruler.3.the ruler is blue.4.Could I use your ruler5.There are some pencils, a pen, a ruler on the desk6.This ruler is too long. 7.Place a ruler next to items like vases when taking photographs8.Where is the ruler 9.You mean the ruler10.Take a ruler, pen and paper and draw the design line 11.In my day, we had ruler fights12. Lily's ruler is longer than my ruler