A:(1)(2)
B:(2)(3)
C:(3)(4)
D:(2)(4)
如图所示,水平传送带上的物体正在向右运动,物体速度逐渐变大,分析物体受到的力有( )
The man in black must be Lily's brother.(改为否定句)
The man in black ____ ____ Lily's brother.