单选题
Oil is derived from the ______ of microscopic sea creatures, and is even older, according to most geologists.
A、
layouts
B、
reminders
C、
remains
D、
leftovers
【正确答案】
C
【答案解析】
[解析] layouts“规划”；reminders“暗示，提醒”；remains“残骸”；leftovers“剩菜，残余物”。答案是C。
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