QUES: The oxygen content of the blood becomes be too low while the blood level of carbon dioxide becomes too high

correct the punctuation.

CORRECTED: The oxygen content of the blood becomes be too low while the blood level of carbon dioxide becomes too high.

QUES: I have shoulder length blonde hair and black eyes

correct the punctuation.

CORRECTED: I have shoulder length blonde hair and black eyes.

QUES: The expulsion By Tomas Neale

correct the punctuation.

CORRECTED:
The expulsion. By Tomas Neale.