问题描述：
Mary was so angry at __ he was doing ___ she left without saying a word.
Mary was so angry at __ he was doing ___ she left without saying a word.
A.what;what B.that;what C.that;that D.what;that
顺便翻译一下这个句子的意思,
Mary was so angry at __ he was doing ___ she left without saying a word.
A.what;what B.that;what C.that;that D.what;that
顺便翻译一下这个句子的意思,
问题解答：
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