He was so angry at she was doing he walked out and closed the door heavily behind him.

问题补充：

-- He was so angry at she was doing he walked out and closed the door heavily behind him.

--I am sorry to hear that.

A. what; that

B. that; what

C. that; that

D. what; what

答案：

(答案→)A. what; that

B. that; what

C. that; that

D. what; what

解析：句意：他对她正在做的事情太生气了，以致于他走出去重重地关上门。对此深表遗憾。be angry at结某事生气，what引导宾语从句做at的宾语，她正在做的事情；so...that如此……以致于，固定句型，故选.A