—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

ONT长发光会导致（）

A、所有业务正常，无影响

B、该ONT无法自动发现

C、会上报长发光告警

D、同一PON口下的其他掉线