-I will go to Beijing for a visit with my family during the winter holiday. ---.A. So d

问题补充：

---I will go to Beijing for a visit with my family during the winter holiday.

---.

A. So do I

B. So I do

C. So will I

D. So I will

答案：

A. So do I

B. So I do

(答案→)C. So will I

D. So I will

解析：句意：——寒假期间我将和家人一起去北京参观。——我也是。So+助动词+主语，表示与上文一样，根据第一根人的话中有 will可知，此处用一般将来时，故选C。