Unearthed in China, fossils of feathered dinosaurs offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds.
- offer the most dramatic evidence yet discovered of the close evolutionary relationship between dinosaurs and birds
- offer evidence more dramatic than what has yet been discovered of the close evolutionary relationship between dinosaurs and birds
- offer more dramatic evidence of the close evolutionary relationship than any yet discovered between dinosaurs and birds
- have offered the most dramatic evidence of the close evolutionary relationship between dinosaurs and birds that have yet been discovered
- have offered more dramatic evidence than any that has yet been discovered of the close evolutionary relationship between dinosaurs and birds
答案是B，但是感觉很模糊。不知道这里为什么其他选项是错误的。有没有DANN给逐一分析一下呢？？多谢啊！！！！ | 
