欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.

　　A. which　　　　B. that　　　　　 C. what　　　　　D. where

Although he knew little about the large amount of work done in the field , he succeeded      other more well-informed experimenters failed.

       A．a(chǎn)s     B．unless       C．what        D．where

Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.

　　A. which　　　　B. that　　　　　 C. what　　　　　D. where

Although he knew little about the large amount of work done in the field, he succeeded ________ other more well - informed experimenters failed.

　　A. which　　　　B. that　　　　　 C. what　　　　　D. where

 Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.

         A. as        B. unless        C. what   D. where