I'm afraid he's more of a talker than a doer, which is_____ he never finishes anything.
A. that
B. when
C. why
D. what
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The little girl who got lost didn’t know ______ she can find her mother.
A. where
B. what
C. that
D. who
There is clear evidence _____ the most difficult feeling of all to interpret is bodily pain.
A. what
B. how
C. if
D. that
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.