单选题 They have developed techniques which are ______ to those used in most factories.
A. more B. better C. greater D. superior

【正确答案】 D

【答案解析】短语be superior to优越于……。又如：He thinks he is superior to us because his father is an important person．他因为父亲是大人物，就自认为高人一等。本句的意思是：“他们开发了比大多数工厂里的都先进的技术。”A、B、C用于be more/better/greater than。