She was so angry at ___he was doing ___she walked out.选填that或what.
问题描述：
She was so angry at ___he was doing ___she walked out.选填that或what.
答
1 what 在句子中充当doing的宾语,正常语序是he was doing what
2 that 这是个强调句句型,is（was）.that
强调她对于他所做的感到很生气,以致她出去了