---Will you go to the Great Wall with us? ---If John wants to go .A. so do IB. so will IC

问题补充：

---Will you go to the Great Wall with us? ---If John wants to go, .

A. so do I

B. so will I

C. so I do

D. so I will

答案：

A. so do I

(答案→)B. so will I

C. so I do

D. so I will

解析：答语含意是“如果John想去，我也去”，所填的是答语中的主句。A时态不合，C、D两项没有倒装。所以只能选B。