——Thank you so much for the lovely evening, Dennis.

——You’re quite welcome, Julie. ____. We’d been looking forward to seeing you.

A．Were glad to meet you

B．I’m afraid you didn’t have a good time

C．Thank you for your coming

D．Just stay a little longer, please

将x＋y中的＋运算符用友元函数重载，应写为 。