I can't remember__I was reading,for I forgot to put the bookmarker back.A what B which C when D where

I can't remember__I was reading,for I forgot to put the bookmarker back.A what B which C when D where
I can't remember__I was reading,for I forgot to put the bookmarker back.
A what B which C when D where

I can't remember__I was reading,for I forgot to put the bookmarker back.A what B which C when D where
D
我不记得读到哪儿了,因为忘放书签了
所以是地点,用where
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D where 根据下文我忘记把书签放回去可知作者不知道读到哪了

D
我记不起来我读到哪里了 这个哪里用where