A:that
B:thi
C:it
D:him
— Would you like to fly a ____ with me?
— Sorry, I can't. I have to do my ____.
下列地理现象的发生与地球自转无关的是 ( )
下列各句中,有语病的一句是()
植物根尖各部分结构中细胞生长、伸长最快的区域是( )