--Jack you look tired today. What’s wrong?-I was busy I didn’t go to bed until midnig

问题补充：

----Jack , you look tired today. What’s wrong?

-I was busy I didn’t go to bed until midnight yesterday.

A. such , that

Btoo, to

Cso ,that

D. enough to

答案：

A. such , that

B. too, to

(答案→)C. so ,that

D. enough to

解析：such , that如此……以至于；too, to太……而不能……；so ,that如此……以至于……；enough to 足够做某事。句意：杰克，你今天看起来很累。怎么了？——我是如此的忙，以至于昨天我直到午夜才上床睡觉。结合语境可知惦C。