Maryhadpromisedtogivemeaticketfortomorrow.Shefailed,

来源：语文精选馆 2.8W

Mary had promised to give me a ticket for tomorrow. She failed, ____.

A. either B. though C. but D. too

选B。结合上下文意思我们可以知道本题表示转折关系，先排除A、D；而but为并列连词通常放在句首或句子中间起连接作用。故选B。