(2013·济南二模)It was during the Ming Dynasty the Great Wall was repaired and extended to take on the appearance it has today.
A. when
B. which
C. what
D. that
网友回答
A. when
B. which
C. what
(答案→)D. that
解析：选D 考查强调句型。句意：在明朝期间，长城得以修缮并扩建，成为现在的样子。此题考查“It is (was)＋被强调部分＋that ...”的强调句型，本题强调时间状语during the Ming Dynasty，故选D。