第18题: [单项选择]Clothing made of plastic fibers has certain advantages over ______ made of natural fibers like cotton, wool, or silk. A. one B. the one C. that D. what 参考答案:C 答案解析:clothing 是衣服、被褥的总称,不能用one 或the one 来指代。what 相当于“先行词+that”,后边要接从句。所以只能用that指代clothing。