单选题
We regret ______ you that the goods you ordered are out of stock.
A、
to tell
B、
telling
C、
having told
D、
to have told
【正确答案】
A
【答案解析】
regret to do sth。表“很遗憾/很抱歉做某事”，regret doing表“后悔做某事”。
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