淮河边某学校八年级同学到皖南山区游学，看到层层梯田上开满了金灿灿的油菜花，读图，回答下列问题。
37＋50=____
30－20=____
68－4=____
8＋40=____
79－60=____
It was _____ impossible for anyone to get admitted without the password.
