问题补充：
after a long walk, Kate called and said she couldn come to the party.
A. Worn out
B. Having worn out
C. To be worn out
D. To wear out
答案：
(答案→)A. Worn out
B. Having worn out
C. To be worn out
D. To wear out
解析：考查过去分词做状语：固定短语：sb be worn out“某人精疲力竭/累坏了”，即sb和wear out之间是被动关系，所以应该用过去分词短语作原因状语，排除表主动关系的B（其表被动时应为having been worn out）；而CD都是用不定式放在句首做目的状语，句意明显不通顺，排除。选A。
