Disturbances in seabed slope which have occurred over short periods of time have caused scientists to believe __________ more extensive than at first thought.
A. that tectonic drift is
B. which tectonic drift
C. tectonic drifts
D. tectonic drifting
Answer:A
Disturbances in seabed slope which have occurred over short periods of time have caused scientists to believe __________ more extensive than at first thought.
A. that tectonic drift is B. which tectonic drift C. tectonic drifts D. tectonic drifting