—You were brae enough to raise objections at the meeting. —Well, now I regret ___ that.
| A．to do | B．to be doing | C．to have done | D．having done |
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—You were brae enough to raise objections at the meeting. —Well, now I regret ___ that.
| A．to do | B．to be doing | C．to have done | D．having done |
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