—We have decided to go for a picnic tomorrow Dick.Are you going with us?—Well you are g

问题补充：

—We have decided to go for a picnic tomorrow, Dick.Are you going with us?

—Well, you are going, so will I.

A. when

B. since

C. if

D. while

答案：

A. when

(答案→)B. since

C. if

D. while

解析：答语为“既然你将去，我也去”。只有since有“既然” 的意思。