Question

(   ) 2. ―Bill,you look tired today. What's wrong?

       ―I was    busy   _ I didn't go to bed until midnight yesterday.

A. so,that B. such,that C. too,to D. enough,to

Answer 1

2. A so + adj./adv. + that从句;such + n. + that从句;选项C和D后加不定式，不能接句子。