Little Tommy was reluctant to tell the schoolmaster _____ he had done the day before.
#73921
A
that
B
how
C
where
D
what
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He left the key ______ he had been an hour before.
#67945
A
what
B
that
C
where
D
which
(2013·青岛一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.
#67260
A
how it is that
B
how is it that
C
it is how that
D
that how it is
― Who are you waiting for?    ― _______ the man wounded in the left leg. 
#70363
A
The doctor will operate on
B
The nurse to be looked after
C
The doctor to operate on
D
His brother got