你是何时来这儿的?----去年夏天 --When ____ you ____there？ --I ____here last summer.

did go

came

did get
got

did come
came

When _did___ you __arrive__there？ --I __arrived__here last summer.
arrive是来到的意思。go只是表示动作。

did come
came
问的是何时来这儿，所以，第一个是come的过去式，设么get \go肯定不对啦

When __did__ you __get__there？ -- I _have been__ here last summer.