若am=2，an=5，则am﹣n=____
— What do you think of my new skirt, Mary?— It's more beautiful than _________.
Kitty plays the piano on Monday and Saturday.
如图，已知直线y=3x﹣3分别交x轴、y轴于A、B两点，抛物线y=x2+bx+c经过A、B两点，点C是抛物线与x轴的另一个交点（与A点不重合）．
某物体以30m/s的初速度竖直上抛，不计空气阻力，g取10m/s2，前5s内物体的（ ）
Were you happy yesterday? Yes, ________.
