Although scientists have______long the human appendix as______organ, there is a growing body of evidence indicating that the appendix does in fact have a significant function as a part of the body's immune system.（） A: overestimated … a minor B: discounted … a vestigial C: valued … a major D: ignored … a pivotal E: studied … an inaccessible

Although scientists have______long the human appendix as______organ, there is a growing body of evidence indicating that the appendix does in fact have a significant function as a part of the body’s immune system. A: (A) overestimated … a minor B: (B) discounted … a vestigial C: (C) valued … a major D: (D) ignored … a pivotal E: (E) studied … an inaccessible