What is his student number?你能肯定吗？不是How many is his student number？ 吗？我不能确定是哪一个，能说一下理由吗？不好意思，我会加分的ten在此只是一个数字，所以用what谢谢了，你真是个专家，我财富值不多，给你十吧谢谢，不用。