— Why did the dinner party start so late last night?
— It was that caused him to serve dinner an hour later than usual.
A. we were late
B. we being late
C. our being late
D. because we were late
网友回答
A. we were late
B. we being late
(答案→)C. our being late
D. because we were late
解析：本题考查强调句的一般用法，强调部分在句中作主语，该句中主语由动名词的复合结构充当。