507. Modern critics are amused by early scholars’ categorizing Tacitus’s Germania as an ethnographic treatise.

(A) scholars’ categorizing Tacitus’s Germania as

(B) scholars’ categorizing Tacitus’s Germania as if

(C) scholars, categorizing of Tacitus’s Germania as

(D) scholars who categorize Tacitus’s Germania as（A）

(E) scholars who categorize Tacitus’s Germania if

我选D。D选项是时态错了吧

我觉得A的sb's doing结构有点别扭，不知道是中了新东方的教条理论，还是自己语感不好。总觉得不顺

先谢谢诸位了！我是按大全做的题，搜索时一般输入“大全 XXX"。有很多G友好象是按别的序列做题，所以每次搜索收获不多。