①青铜农具的使用 ②铁农具的使用 ③牛耕技术的推广 ④井田制的实行
A:①②
B:③④
C:①③
D:②③
Joan is not here. She _____ in the next room.
——I don't know if Aunt Li to look after these“stay-home children”tomorrow morning.——If he ,I will phone you.
根据图片写出其对应的英文单词。
____
My best friend and I……
12x=911
X=____