Just as I -----the door ,someone came to see me.

问题描述:

Just as I -----the door ,someone came to see me.
A.close B.am closing C.was closing D.closes

C.was closing
当我正在关门时,有人来看我.
有人来看我时,我关门的动作正在发生,而看我这个动作是发生在过去的,所以关门用过去进行时.