Sentence Correction

试题详情

题目:

The type of behavior exhibited when an animal recognizes itself in a mirror comes within the domain of “theory of mind,” thus is best studied as part of the field of animal cognition.

选项:

A、
A. of “theory of mind,” thus is best
B、
B. “theory of mind,” and so is best to be
C、
C. of a “theory of mind,” thus it is best
D、
D. of “theory of mind” and thus is best
E、
E. of the “theory of mind,” and so it is best to be

答案:

D

提问:

请问这题是如何选到D的,thus后面省略了哪一部分的语法结构?
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