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

A. that

B. since

C. before

D. when

孔子认为教学过程是（）？

A.教师为中心的教的过程

B.学生为中心的学的过程

C.教师与学生双边活动的过程

D.学生自主建构的过程