[求助]GWD 14-30

Q30:

The ancient Anasazi harvested such native desert vegetation as the purple-flowered bee plant, what they now commonly call wild spinach in northern Arizona and other parts of the southwestern United States.

1. what they now commonly call
2. a plant that they now commonly call
3. now commonly called
4. and is mow commonly called
5. which it is now commonly called

答案是C。

B为什么不对？ 同位语从句不是更好吗？是因为purple-flowered bee plant 和a plant that they now commonly call里的plant重复了，没有必要？

谢谢

they不是指“The ancient Anasazi”吗？从句意上理解好像是这样。但你提醒得好，代词有清晰的指代对象。“The ancient Anasazi”不知道单复数形式，也不知道可不可以用they指代。

另一个问题，是否-ed过去分词短语比用同位语从句简洁，所以即使指代清晰得话，还是优先用C？ 

同位语从句与ed的修饰意义应该是不一样的，ed的修饰关系比起同位语从句更紧密。

这个地方用they是不合适的。。

明白了，谢。