—Are you going to see the film with us?—If Mary wants to go .A. so do IB. so will IC. I al

问题补充：

—Are you going to see the film with us?

—If Mary wants to go，.

A. so do I

B. so will I

C. I also go

D. so I will

答案：

A. so do I

(答案→)B. so will I

C. I also go

D. so I will

解析：表示“也……”时用“so +助动词（情态动词……）＋主语”。因从句用一般式，所以主句用将来时形式。