In his victory speech ________before a huge crowd of his supporters，Obama declared that “change has come to America”．
| A．having delivered | B．to be delivered |
| C．delivering | D．delivered |
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In his victory speech ________before a huge crowd of his supporters，Obama declared that “change has come to America”．
| A．having delivered | B．to be delivered |
| C．delivering | D．delivered |
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