(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
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All 5 children of the Blacks, _______ are now working abroad, will come back for their parents’ 50th wedding anniversary.
#68495
A
two of whom
B
two of them
C
both of whom
D
both of them
One of the most interesting places in Beijing____the foreigners want to visit is the Great Wall.
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A
which
B
that
C
what
D
where
—Do you have anything to say for yourselves?—Yes, there is one point ________ we must insist on.
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A
why
B
where
C
how
D
that