We regret ______ you that we no longer manufacture the item you have ordered.
A．advising
B．to advising
C．advise
D．to advise

A.
A．advising
B．to
B.advise
D．to

【参考答案】

D
本题考查非谓语动词，regret后面用带to的动词不定式和动名词时意义不同：用不定式意思是'遗憾地去……(事......

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