GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 85SZ7Q36EW47KQ04X

For more than a century, geologists have felt comfortable with the idea that geological process, although very (i)____________, are also (ii)____________ and so are capable of shaping the Earth, given enough time. A. slow B. intermittent C. unpredictable D. steady E. ponderous F. sporadic