English Ordering Sentences Online Test 2

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Question : 97 of 100
 
Marks: +1, -0
S1: We and all other animals breathe in and breathe out air all the time.
P: If we stop breathing, we die.
Q: It is because of this fact that we are able to live.
R: It is called the atmosphere.
S: All parts of the earth are surrounded by air.
S6: It is a part of the earth.

The Proper sequence should be:
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