She couldn’t help when she heard the news. A. cry B. to cry C. crying

问题补充：

She couldn’t help when she heard the news.

A. cry B. to cry C. crying

答案：

解析：C “情不自禁做某事”can’t help doing sth.“不能帮忙做某事”can’t help (to) do sth.源于help sb. (To) do sth.。“当他听到那个消息时忍不住哭了起来。”故选C。