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At three o'clock this morning ,I seemed __someone screaming

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At three o'clock this morning ,I seemed __someone screaming in the street
A hearing
B having heard
C to have heard
D to hear
C
首先可以排除AB,因为没有seem doing 这个结构.
seem to have done 看起来...(已经做了某事).强调做这件事是在seem之前
seem to do 看起来……(还没做某事).
所以选C