Scientists are working on new fuels to find ______ that burns mo

Scientists are working on new fuels to find ______ that burns more cleanly than gas.
A、everything
B、one
C、anything
D、some
【正确答案】：B
【题目解析】：one可指代前文叙述过的名词。此处指代一种燃料。句中意思是科学家正研究开发以便找到一种燃烧时比天然气更清洁的新燃料项符合题意。答案为B。