NOT ONLY_____TO DETERMINE THE DEPTH OF THE OCEAN FLOOR, BUT IT IS A...
29.Not only_____to determine the depth of the ocean floor, but it is also used to locate oil.
A.to use seismology
B. is seismology used
C.seismology is used
D.using seismology
29.Not only_____to determine the depth of the ocean floor, but it is also used to locate oil.
A.to use seismology
B. is seismology used
C.seismology is used
D.using seismology