我滑雪时拉伤了腿部肌肉。

I ___pulled ___a ___muscle in my leg when I was skiing.

他在健身房举重时拉伤了背部肌肉。

He ___pulled ___a ___muscle in his back while lifting weights at the gym.

打网球比赛时小心别拉伤肌肉。

Be careful not to ___pull ___a ___muscle during your tennis match.