–The weather is very cold these days. –.A. So do I B. So is itC. So it is

问题补充：

–The weather is very cold these days. –.

A. So do I B. So is itC. So it is

答案：

解析：句意;这些日子天气非常寒冷。确实如此。So+助动词/情态动词/系动词+主语：某某也如此；so + 主语+助动词/情态动词/系动词+主语：某某确实如此。该句式在时态，人称上与前一个句子相同。结合语境选C