fix

ex/theme-12-classroom-phrases/practice-05.md

@@ -2,7 +2,7 @@
 
 ### Exercise 13. Choose the answer
 
-Example: a) Yes, it is. b) Yes, they are. -> a)
+Example: Teacher: Open your book. a) OK. b) Blue. -> a)
 
 1. Teacher: Open your book.  
    a) OK. b) Blue.
@@ -24,7 +24,7 @@ Example: You want to ask politely. -> Excuse me.
 
 ### Exercise 15. Match the object and the word
 
-Example: 1 -> b
+Example: notebook -> a school thing for writing
 
 1. eraser
 2. notebook