–-I will go to Beijing for a visit with my family during the long holiday of May.---.A. So

问题补充：

–-I will go to Beijing for a visit with my family during the long holiday of May.

---.

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：五一长假期间我将和家人一起去北京旅行。我也是。“So+助动词/情态动词/be动词+主语”则表示“前面的肯定情况也适用于后者”；前句是说将要去度假，故表示将来，用So will I；故选C。