语法与词汇 Soap operas, a type of television drama series, are so called because at first they were ---such as soap manufacturers.

【正确答案】 C

【答案解析】分析：语序题，such as的前面必然是名词，只有C符合。同时，被动语态，只有 were sponsored 也就是C符合。翻译：肥皂剧，一种电视系列剧，之所以被称作肥皂剧是因为起初它们是由肥皂制造商等商业公司提供赞助的。