单选题   Clothing made of plastic fibers has certain advantages over ______ made of natural fibers like cotton, wool, or silk.
 
【正确答案】 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。