fix

ex/theme-08-this-these/practice-01.md

@@ -4,7 +4,7 @@ Source style: demonstrative choice and sentence completion.
 
 ### Exercise 1. Write this is or these are
 
-Example: one bag -> This is my bag.
+Example: __________ my pencil. -> This is my pencil.
 
 1. __________ my pencil.
 2. __________ my books.
@@ -14,7 +14,7 @@ Example: one bag -> This is my bag.
 
 ### Exercise 2. Choose the correct word
 
-Example: apple / banana -> apple
+Example: This / These are apples. -> These
 
 1. This / These are apples.
 2. This / These is my bag.
@@ -23,7 +23,7 @@ Example: apple / banana -> apple
 
 ### Exercise 3. Match
 
-Example: 1 -> b
+Example: This is -> an apple.
 
 1. This is
 2. These are