the pet dog ____ her on the arm when she ______ it A was biting:was hugging B bit : hugged C bit: w

问题描述:

the pet dog ____ her on the arm when she ______ it A was biting:was hugging B bit : hugged C bit: w
A怎么解释?

就是强调动作在过去的那个时候正在进行. 这句话的意思是“当她抱着宠物狗的时候,她的宠物狗咬着她的手臂.”有进行时,比较形象,对于我来,用进行时,我能想象出那场景.如果用B的话,只是陈述一件事.