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By: achieve_goal (offline)  Tuesday, June 25 2013 @ 08:41 AM CDT (Read 444 times)  

Hey there, I need some help with this Science question.

1. Which of the following substances pass through the circulatory and digestive systems of the human body?

A= food
B= water
C= oxygen

1. A and B
2. A, B and C
2. Which of the following activities will contribute to global warming?

A= Burning of fossil fuels
B= Planting crops on fertile land
C= Chopping down of trees in forests

1. A and B
2. A and C

Thank you in advance! Surprised!

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