On arriving home, she was surprised to find that the kitchen was filled with _______ smelled liked tasty dishes.
A.which
B.it
C.that
D.what
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D解析考查从句连词的选择。根据句子结构可知，该句为宾语从句，从句中缺少smell的主语，因此选择what，which用于有范围的情况，that不做成分句意为，一到家，她就很惊讶地发现厨房了充满了像美味的菜肴一样的味道。