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11. B 从下文My cap had gone away 和Tired and discouraged看应该是脚扭伤了疼痛
12. C appear 外表给人的印象，暗含事实并非如此 There appears to be; It appears that;Sb appears to do 后跟to be；均可跟as if\like ，seem 判断有一定依据，接近事实 There seems to be; It seems that；Sb seems to do ；look 视觉给人的印象 Sb looks to be。（叠起来的盘子）
13.D 因为Tired and discouraged，我似乎没有能力把事情做好了。
