题目：
--__________ was it_________ they discovered the entrance to the underground place?
--Totally by chance.
A．How; that
B．What ; that
C．When; when
D．Where; that
答案：
答案：A
本题是强调句的考查。考生可以将问句转为陈述句语气，这样题意就比较清晰：“It was how that they discovered the entrance to the underground place．”
