ES 1 PAG. 206
1. is
2. isn't
3. Is
4. are
5. are
6. aren't
7. am not

ES 2 PAG. 206
1. Are doing
2. Is writing
3. Isn't writing

4. Is thinking
5. Is
6. Thinking
7. Is watching
8. Is talking
9. Aren't trying
10. Am I doing
11. Am wasting

ES. 3 PAG. 206
1. ARE you waiting
2. I'm waiting
3. Are you using your phone
4. I'm not
5. Is Paul wearing
6. he is

ES. 4 PAG. 206
1. I'm waiting
2. Is he working today?
3. He is
4. What are you cooking?
5. Joe is getting pizza for you.
6. Where he is buying?
7. They are selling pizzas

ES. 5 PAG 206
1. What are you reading?
2. I'm going to school
3. Steve is playing tennis with Alex.
4. Why are you sitting down?
5. They are building a new house.
6. Are you writing emails?
Es.1
A) Building
B)Working
C)Teaching
Es.3
1. E

2. A
3. B
4. D
5. C
Es.4
1. On
2. In
3. With
4. Children
5. Money
6. Vegetables
7. A house
Es.5
1)
A learn
B teach
2)
A teach
B learn
3
A learn
B teach
4)
A learning
B teaching