Question

—My brother and I will go to the library tomorrow.
—     . Shall we go together?

A．So I do

B．So do I

C．So will I

D．So I will

Answer 1

C

C tomorrow将来时用will，排除A、B；表示“某人也一样”用so +do/will/can +主语；而表示“确实如此”用so +主语+will/can/do。本题“我（明天）也要去。”故用So will I。