I can't tell you the news _____ I am not quite sure.

I can't tell you the news _____ I am not quite sure.
A that B which C what D of which
选D
There is a feeling in me_____they will never trust me.
A which B that C of which D what
选B
It was in the hall_____we had a lecture_____ I lost my testbook.
A that…which B that…that C where…that D which… which
选C