I was so excited last night that it was a long time I got to sleep.A. thatB. sinceC. befor

问题补充：

I was so excited last night that it was a long time I got to sleep.

A. that

B. since

C. before

D. when

答案：

A. that

B. since

(答案→)C. before

D. when

解析：固定句型。It be 一段时间before从句，意为：一段时间以后某事才发生。结合句意可知C正确。