问题补充：
She when she received her medical report.
A. could help but to cry
B. couldn’t help but crying
C. couldn’t help crying
D. couldn’t help to cry
答案：
A. could help but to cry
B. couldn’t help but crying
(答案→)C. couldn’t help crying
D. couldn’t help to cry
解析： 考查短语辨析，can’t help to do 不能帮助做某事，can’t help doing 情不自禁做某事，句意：当她收到她的医疗报告的时候她禁不住哭了。故选C。
