An idea came to her______ she might do the experiment in another way.
A. that
B. what
C. when
D. which
Obviously there was little certainty______ the chairman would agree to this proposal.
A. which
B. why
C. what
D. that
I have no idea______ has happened to him.
A. what
B. that
C. when
D. why
If you had told me just______ I was to do they would never have found fault with my handling of the case.
A. that
B. what
C. which
D. whatever