It was _____ she took off her dark glasses _____ she was a famous film star. [ ]

A. when, that didn't realize

B. not until, that I realized

C. not when, when I realized

D. until, that I didn't realize

大腿肌肌肉拉伤的原因是（）

A.柔韧性差

B.大腿前后肌群力量法杖不平衡

C.训练过程中出现疲劳

D.以上都是