Student’s Book All the written activities in this book must be

3
Listen
7. 
Listen to the conversation between a guide and some visitors. What 
are they doing today? What other activities does the guide mention?
8. 
Listen again and complete the sentences. 
a. 
It has operated as a national park since 
.
b. 
I’ve worked as an eco-tourist guide for 
.
c. 
It’s our newest route – it’s been open for 
.
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9. 
Look at the sentences in exercise 8 and choose the correct options.
a. 
These situations 
are finished actions / started in the past and are still true now. 
b. 
They are in the 
present perfect / present simple
tense.
c. 
We use 
for / since
to give the moment when the situation started.
d. 
We use 
for / since
to give the duration of the situation.
10. 
Complete the sentences. Use the verbs in the box in the present perfect tense, and add 
for
or 
since
. 
Focus on Language
live – have – protect – be – work – study
a. 
In our school, we respect nature and
fauna and flora 
the sixth 
grade.
b. 
I 
at a school in Bogotá 
five years.
c. 
My family and I 
in the park 
nine o’clock this morning.
d. 
Indigenous people 
in the park 
a long time.
e. 
I 
this watch 
two months. 
f. 
My uncle 
as a park ranger 
December.
11. 
Write answers to the following questions using 
for
 and 
since