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- As the earth’s crust is thicker under the continents, the equipment would have to be capable of drilling through 50,000 feet of rock to investigate the mantle … .
Question 1:
As the earth’s crust is thicker under the continents, the equipment would have to be capable of drilling through 50,000 feet of rock to investigate the mantle … . A. beneath them
B. beneath their
C. beneath they
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