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

46. - DE THI THU THPT QUOC GIA NAM 2017 MON TIENG ANH TRUONG THPT QUANG XUONG 1 THANH HOA LAN 1 CO DAP AN
Tiếng Anh DE THI THU THPT QUOC GIA NAM 2017 MON TIENG ANH TRUONG THPT QUANG XUONG 1 THANH HOA LAN 1 CO DAP AN

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.