[ Science ]
What is the level of nitrogen in the atmosphere of the Earth?
A. 70%
B. 15%
C. 7%
D. 5%
E. 2%
Select your answer:
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Modal Verbs › ViewWhat modal verb is used to express the possibility of getting an advance on salary?
A. could
B. should
C. must
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Grammar › View
My father … from home and my mother … at my school.
A. works, teaches
B. work, teach
C. working, teaching
D. working, teaches