feat: examples

ex/theme-02-to-be/practice-06.md

@@ -2,12 +2,16 @@
 
 ### Exercise 16. Choose
 
+Example: apple / banana -> apple
+
 1. I (am / is) happy.
 2. She (is / are) my teacher.
 3. They (am / are) in class.
 
 ### Exercise 17. Match
 
+Example: 1 -> b
+
 1. He is
 2. We are
 3. It is
@@ -18,18 +22,24 @@ c. at school.
 
 ### Exercise 18. Short answer
 
+Example: Are you OK? -> Yes, I am.
+
 1. Are you fine? __________
 2. Is it a bag? __________
 3. Are they friends? __________
 
 ### Exercise 19. Make the negative
 
+Example: He is happy. -> He is not happy.
+
 1. She is happy. -> She __________ happy.
 2. We are at home. -> We __________ at home.
 3. It is red. -> It __________ red.
 
 ### Exercise 20. Make a sentence
 
+Example: my / book -> My book.
+
 1. he / is / busy  
    ____________________
 2. they / are / at the zoo  
@@ -37,6 +47,8 @@ c. at school.
 
 ### Exercise 21. Complete
 
+Example: I ___ happy. -> am
+
 1. A: Is she a pilot?  
    B: Yes, she ________.
 2. A: Are you ready?  
@@ -44,12 +56,16 @@ c. at school.
 
 ### Exercise 22. Choose
 
+Example: apple / banana -> apple
+
 1. The farmer (is / are) tired.
 2. The robot (is / are) in the park.
 3. The nurses (is / are) busy.
 
 ### Exercise 23. Match
 
+Example: 1 -> b
+
 1. The pilot is
 2. The robot is
 3. The children are
@@ -60,5 +76,7 @@ c. in the park.
 
 ### Exercise 24. Write one sentence
 
+Example: my / book -> My book.
+
 Use: the nurse / is / ready  
 ____________________