Question

’Though I understand the all mysteries and all knowledge, and though I have all faith, sResearchers disagree _______________whether a large ocean ever existed on Mars, but one thing is certain: Maintain geology in turning ___________to be strange and complex.

A. of/round
B. in/over
C. for/up
D. on/out

Answer 1

though i understand all the mysteties and all knoledge, and though i have all faith, sreserchers disagree on wether a large ocean ever exsited on Mars ,but one thing is certain: maintain geology is turning out to be strange and complex

the answe is D.on/out