—Well. I do think the rabbit is a beautiful gentle animal which can run very fast. — .A.

问题补充：

—Well. I do think the rabbit is a beautiful, gentle animal which can run very fast.

— .

A. So it is

B. So is it

C. So does it

D. So it does

答案：

(答案→)A. So it is

B. So is it

C. So does it

D. So it does

解析：句意：我认为兔子是一种漂亮，温顺，能跑的很快的动物。确实如此。表同意上文的说法，用so+主语+助动词/系动词/情态动词。上文用的是is系词，下文也用系词。所以选A。