To some of our problems there was more than one right answer, so we were looking at the student's reasoning as to how they got it and if they could __________ the answer they had. 有时我们的一些问题会有不止一个 正确 答案 , 所以我们要看看学生的推理过程,看看他们是如何得到这个答案的 ,以及 他们如何证明他们的答案是正确的。