问题
选择题
----______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
答案
答案：A
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。
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