下列说法正确的是[ ]

A．所有电荷在磁场中都要受磁场力的作用

B．所有电荷在电场中都要受电场力的作用

C．运动电荷在磁场中只有垂直于磁场方向的速度分量不为零，才受到磁场力的作用

D．一切运动电荷在磁场中都要受磁场力的作用

When a pencil is partly in a glass of water, it looks as if it _____. [ ]

A. breaks

B. has broken

C. were broken

D. had been broken