--- Whose names are these, ________ or yours?

---_______. I don’t know all of the students in Class 5, so I have _______on this piece of paper.

A．theirs; Theirs; them

B．their; Theirs; they

C．their; Theirs; them

D．theirs; They; them

下列与惯性有关的现象或做法是（　　）

A．乘坐小汽车必须系安全带

B．多数人习惯于用右手写字

C．汽车关闭油门，速度渐渐减小

D．水从高处向低处流