—Is Kate coming to the party this evening?
—No, she _________ be at the party. She________ to the UK.

A．mustn't; has gone	B．mustn't; has been
C．can't; has gone	D．can't; has been

科目 英语   题型 单选题   难度 中等

知识点： 情态动词的被动语态 时态辨析