it" in bold in paragraph 2 refers to___________.,,,,the mantle|==the crust|the Earth|the core">
1
perceive" in bold in paragraph 3 is closest in meaning to___________.,,,,==detect|comprehend|prevent|locate">
2
adjoining" in bold in paragraph 2 is closest in meaning to___________.,,,,residing|approaching|==bordering|appearing">
4