While reading in the garden,        .   

A．an apple hit him on the head                          B．his head was hit by an apple 

C．he was hit on the head by an apple                 D．he was hit on his head by an apple 

While reading in the garden,__________________.

A．an apple hit him on the head                               B．his head was hit by an apple

C．he was hit on the head by an apple              D．he was hit on his head by an apple