Do you still remember the mountain ( ) we went camping last year?Yes,it's ( ) I'll never forget.
问题描述：
Do you still remember the mountain ( ) we went camping last year?Yes,it's ( ) I'll never forget.
分别填什么,特别是第二空.
答
where,what
where=in the mountain
what作forget的宾语,表示不能忘记的事（what)