（ His）first name is ( Bill).( )last name is ( Gates) .We are good friends.
问题补充：
（某的 ）first name is (名字 ).(某的 )last name is (姓氏 ) .We are good friends.
问题再补充：
_My__ _friend's__last name is ……
_My__ _boss's__last name is ……
_My__ _boyfriend's__last name is ……
__My_ __teacher's_last name is ……