If you suffer an injury during exercise or if pain or discomfort makes you think an in

问题补充：

If you suffer an injury during exercise, or if pain or discomfort makes you think an injury is developing, stop right away and call me.

A. the; a

B. 不填; the

C. an; the

D. 不填; 不填

答案：

A. the; a

B. 不填; the

C. an; the

(答案→)D. 不填; 不填

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