They saw that blood type A kids right away told on the substitute teacher, type B kept the secret, type O also told on the sub, and AB promised to keep it secret but then ratted the sub out anyway.
A 型血的孩子立即告诉另课老师,B 型血的孩子则保守秘密,O 型血的孩子也直接跟另课老师说,AB 型的孩子承诺保守秘密,但是背后又打小报告了。
These National Guard members who are substituting, they're not just in there, just randomly doing something, they're following the classroom teacher's lesson plan.
One Japanese television show aired an experiment to see how kids would react when a “substitute teacher” dropped a vase that the kids were told was very important.