(2013·青島一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.
A．how it is that B．how is it that
C．it is how that D．that how it is
A
選A　考查強(qiáng)調(diào)句型。分析句子結(jié)構(gòu)可知，wondering后為賓語(yǔ)從句，賓語(yǔ)從句中含有一個(gè)強(qiáng)調(diào)句的特殊疑問(wèn)句。由于賓語(yǔ)從句要用陳述語(yǔ)序，故選A。
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