Was it the Moonstone’s bad luck caused so many strange things to happen during the evening?
A. before
B. when
C. since
D. that
网友回答
A. before
B. when
C. since
(答案→)D. that
解析：考查强调句：结构是：It is/was+强调部分+that+其余部分，这句话强调的是the Moonstone’s bad luck，是强调的主语，去掉强调句结构可以变成：the Moonstone’s bad luck caused so many strange things to happen during the evening，是可以成立的句子，所以是强调句，句意：是月亮石的坏运气导致晚上有这么多奇怪的事情发生吗？选D。