which / which one
which one は一つだけ選ぶ。
which is なら一つだけ選ぶ。
which are なら複数選ぶ。
だから、
Which is yours?
Which one is yours?
どちらもOK。
which one は一つだけ選ぶ。
which is なら一つだけ選ぶ。
which are なら複数選ぶ。
だから、
Which is yours?
Which one is yours?
どちらもOK。