题文
I regret _______ that I’m busy ______ my lessons.
| A．to say; to prepare | B．to say; preparing |
| C． saying; to prepare | D．saying; preparing |
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I regret _______ that I’m busy ______ my lessons.
| A．to say; to prepare | B．to say; preparing |
| C． saying; to prepare | D．saying; preparing |
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