问题补充：
After a long walk, Mary’s legs and she couldn’t run any further.
A. gave out
B. broke out
C. tired out
D. stuck out
答案：
(答案→)A. gave out
B. broke out
C. tired out
D. stuck out
解析：考查词组辨析：A. gave out分发，耗尽（不及物）B. broke out爆发C. tired out精疲力竭，是及物动词短语 D. stuck out伸出，句意：走了很长时间，玛丽的腿没了力气，不能在走了。选A。
