题干
—Is Jay on his way to the cinema?
—I regret ______ you that he can't come today.
A：to tell
B：telling
C：told
D：having told
答案(点此获取答案解析）
A
—Is Jay on his way to the cinema?
—I regret ______ you that he can't come today.
A：to tell
B：telling
C：told
D：having told
，
，则集合
等于（ ）