Mary keeps talking about the party. She had a very good time,_______?
A:hadn't she
B:had she
C:didn't she
D:did she
— is my new friend.
马克思主义哲学创立之后,开始出现了 ( )
全班每人掷一元硬币一次,看看哪面向上,将情况记录下来并统计结果.
图案向上
币值向上
次数