---- was it they discovered the entrance to the underground palace?
----Totally by chance.
A. How, that
B. What, that
C. When, when
D. Where, that
网友回答
(答案→)A. How, that
B. What, that
C. When, when
D. Where, that
解析：本题考查强调句式中带有特殊疑问词的用法，上面已经多次提到，这里不再详细说明。