NOT ONLY _________ TO DETERMINE THE DEPTH OF THE OCEAN FLOOR, BUT IT...

Câu 46: Not only _________ to determine the depth of the ocean floor, but it is also used to

locate oil.

A. seismology is used B. is seismology used C. using seismology D. to use seismology

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to

complete each of the following exchanges.