I don't believe that boy can sing so well.
A:a 8-year-old
B:a 8-years-old
C:an 8-years-old
D:an 8-year-old
①因为____,所以英子鼓起勇气微笑着面对生活。
②金吉娅用妈妈给的二十美元____。
③提铅锤的实验成功了,主要是因为____
My parents are ________ with my good grades.
如图所示,将两个一次性纸杯杯口向上叠套起来,用手握住外面的纸杯,在靠近杯口的正上方且平行于杯口方向用力吹气。请你猜测里面的纸杯将:()