题目内容
—I heard you had a quarrel with your desk mate.
—Well, now I regret _______ that.
A. do B. to be doing C. to have done D. having done
D
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题目内容
—I heard you had a quarrel with your desk mate.
—Well, now I regret _______ that.
A. do B. to be doing C. to have done D. having done
D