________didn't Dad allow us________？Dad did not allow us to open the presents．A.Why，／B.What，toC.What，to doD.Where，to go
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C解析分析：对不是“人”的宾语及宾语补语提问都用what，此处是对作宾语补语的动词不定式to open the presents提问，用what，同时要保留动词不定式形式。(延伸)对动词不定式的宾语the presents提问，也用what，如：What didn't Dad allow us to open？