Q31:

Scholars who once thought Native American literatures were solely oral narratives recorded by missionaries or anthropologists now understand this body of work to consist of both oral literatures and the written works of Native American authors, who have been publishing since 1772.

1. Scholars who once thought Native American literatures were solely oral narratives
2. Scholars thinking of Native American literatures once solely as oral narratives, and
3. Scholars who once had thought of Native American literatures solely as oral narratives and
4. Native American literatures, which some scholars once thought were solely oral narratives
5. Native American literatures, which some scholars once, thinking they were solely oral narratives

Answer: A

我之前看过think sth. as...所以选了C，可正确答案是A，为什么呢？

1. You always need a past tense to have a past perfect, to indicate the latter event happened before the former one. There's no "did" in this sentence.
2. Literatures here ARE oral narratives. Note: this work consists of both oral literature (narratives) and...

我想问A选项这里是不是省略了thought后面的that,要不然thought和were变成有两个动词了。

thanks !!