---Where are you going your next vacation?-We decidedEurope.A. on forB. for toC. On

问题补充：

---Where are you going your next vacation?

---We decidedEurope.

A. on, for

B. for, to

C. On, to.

D. for, on

答案：

A. on, for

B. for, to

C. On, to.

(答案→)D. for, on

解析：句意：下个假期你们要去哪儿度过？我们决定去欧洲。go for a vacation去度假，decide on决定，故选D。