The stone on the river bank rolled under her feet； she was into the river and she called o

问题补充：

The stone on the river bank rolled under her feet； she was into the river，and she called out for help.

A. being jumped

B. jumped

C. pulled

D. being pulled

答案：

A. being jumped

B. jumped

C. pulled

(答案→)D. being pulled

解析： was being pulled是过去进行时的被动形式。