问题
选择题
— 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
答案
答案：C
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。