复柬：

愉快地接收某人……邀请

accept with pleasure sb’s kind invitation to be present at…

thank sb.for his kind invitation to…which he has much pleasure in accepting

have much pleasure in accepting…

表示遗憾 regret that…

不能接收邀请be unable to accept…

…使他们无法赴约Prevent them from accepting…

由于…owing to;because of

事先有约 a previous engagement(appointment)

紧急会议 an emergency meeting

患病illness

感谢邀请我参加…… many thanks for your kind invitation to…

很高兴接收…邀请 I’m delighted to accept…

如电话所约 as arranged over the phone

不必接我 don’t bother to meet me

谢谢想着邀我参加 thank you for including me