Generally, the first stage in the extraction of 【crude】 oil is t

Generally, the first stage in the extraction of 【crude】 oil is to drill a well into the underground reservoir.
A、grim
B、strict
C、raw
D、severe
【正确答案】：C
【题目解析】：句意：一般来说，提取原油的第一阶段是把井钻到地下油田。crude意为“天然的，未加工的”。选项中grim意为“冷酷的”；strict意为“严格的”；raw意为“未加工的”；severe意为“严峻的”。故本题选C。