What is ben's last name?

What is ben's last name? what is Ben's last name 这句话是什么意思 what is your brother`s name?________(he)name is Ben. what's his last name? what,is obamas last name? （一）Ben:Hello.My name's Ben Smith.What's your name?Amy:Hi.My 关于英语（一)Ben;Hello.my.name is Ben Smith.What is your name?Amy: what's your name?My name is( What's your name What's your first name 和What's your last na The boy's ().His last name is (). What's your name?为什么不是your name is what? what's your name和what's your last name有什么区别