英文姓氏的称呼问题

Mr. Agrawal
Mr. Billard

Use last name to address people formally. Usually first name is fine.

称呼对方Mr.姓氏   外国人的名字不是名在前姓在后。

The English name is usually listed as "FirstName MiddleNameInitial LastName", you could call David or Mr. Argrawal. The same appliles to Lynne Billard, you could use either Lynne or Mr. Billard.

应该是MR.Billard