他来自哪里：where does he come from ; where is he from；Where he came from；Where did he come from；Where he comes from。
I don't know where he is from.
They often ask him where he is from, how old he is, and what school he goes to.
On being asked where he came from, he kept silent.
Where do/does… come from?
Until there are Silicon Valleys all over the place, the world (and not just America) would be better off if American firms could hire the best people regardless of where they come from.