1.改句子：Although long considered a vestigial organ that has no function in humans,(the appendix,some scientists believe,ma
1.改句子：Although long considered a vestigial organ that has no function in humans,(the appendix,some scientists believe,may have) a significant role as part of the body's immune system.
正确答案是a,就是不改动
我选的是b：改成：the appendix,which,some scientists believe,may have
答案说b的话,句子就没动词,但which,some scientists believe,不是插入语吗?所以动词是may 反而a我觉得错是因为有2个动词啊：believe和may（some scientists believe不是插入语吧?）
2、语法改错：Some plants use chemical signals A.(that repel) insects,and B.(also ,these) signals help to put neighboring plants on alert C.(so they can) D.(mount their own defenses).E.(No error)
说also多余.这很无厘头啊觉得＝ ＝.不算多余吧?
c里so they can 的“they”没有指代不明的嫌疑吗?前面有signals和plants2个复数名词,所以they可以指代任何其一,所以犯了指代不明的错误吧?不对么?
第一题选A some scientists believe做一个插入成分,整句话相当于some scientists believe the appendix may have a significant role as part of the body's immune system.如果用 the appendix,which,some scientis...