Clasification of different sectors: primary, secondary and tertiary.
Primary and Secondary sectors explanations
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Clasification of different sectors: primary, secondary and tertiary.
Primary and Secondary sectors explanations
Teacher4ever 
Hi Cristiana I’m Gonzalo.I have seen the two videos of works.
Bye.
Hello
cristiana i see the two videos of sciencie
You are always doing your work perfectly! I am very proud of you
kisses
Hi Cristiana I’m Gonzalo I see the two videos and i do Science there were very easy.
Bye.
For you everything is easy because you study a lot jejeje
Hola cristiana te echo de menos