A:Would you care to join for the picnic tomorrow?明天你能参加我们的野餐活动吗?
B:Much to my regret, I'll have to meet my girlfriend at the airport then.太遗憾了,明天我要去机场接我的女友。
A:We'd like to invite you for our dress party tomorrow evening, are you free?我们想邀你们参加明晚的化装舞会,有空吗?
B:Much as we'd like to, but we've booked up already for that time.我们很想去,但是明晚已有安排了。
A:What a pity! You can't join us.你们不能参加,真可惜。
B:So sorry. Next time we'll go, thanks anyway.实在抱歉,下次一定参加,不管怎样还是要谢谢你。