There is clear evidence _____ the most difficult feeling of all to interpret is bodily pain.
A. what
B. how
C. if
D. that
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Do you have any idea _____ is actually going on in the classroom.
A. that
B. what
C. when
D. why
_____ we understand things has a lot to do with what we feel.
It is often the case _____ anything is possible for those who hang on to hope.
This is ____ my father has taught me---to face difficulties and hope for the best.