Mary__by the river when a black cat ran past her.A,sat B,has sat C,was sitting D,sits
问题描述：
Mary__by the river when a black cat ran past her.A,sat B,has sat C,was sitting D,sits
答
选C,意思是玛丽坐在河边的时候,一辆黑色的小轿车从她身边开过.