___you are here why not sit down and have a drink?no,thanks o have just done itA just now B now that C at first D because of
问题描述：
___you are here why not sit down and have a drink?no,thanks o have just done it
A just now B now that C at first D because of
答
B。
既然。
答
B.now that
既然.
既然你来了,为何不坐下喝一杯?
不,刚喝完