There is a tuition center near my place which predict exam question accurately, even UPSR. So, you can find some similarity between their answers. When they teacher try to find out the truth, they begin to lie. 我家附近的补习中心经常能正确的预测开始题目，甚至UPSR. 你可以从他们的答案找到很多共同点，当老师找出真相时，学生就开始讲骗话了。