_____ is certain is ______ the mystery of Stonehenge has never been fully explained.
#79445
A
It, that
B
What, what
C
It, what
D
What, that
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--- I prefer to stay at home on weekends. ---That is ______ I disagree. You should go out and breathe some fresh air.
#79367
A
what
B
when
C
why
D
where
Perseverance is a kind of quality --- and that’s ________ it takes to do anything well.
#79415
A
why
B
that
C
which
D
what
The boss believed Tom's reason for being late for work is ______ he had to help his grandma cook.
#79482
A
why
B
that
C
where
D
because he