问题补充:
out after a long walk ,Tom called and said he couldn’t come to the party.
A. Having worn
B. Being worn
C. To wear
D. Worn
答案:
A. Having worn
B. Being worn
C. To wear
(答案→)D. Worn
解析:句意:汤姆在走了很长的路后,他打电话说他不能来参加晚会了。这里sb be worn out某人精疲力尽。这里逻辑主语Tom与wear out是被动关系,故用过去分词,选项B表示正在进行,根据句意故选D。