[解析]
(1)D.推理判断题.根据第三段His face relaxed a little,but one of his feet kept beating the carpet.可知当时Percival看到Laura的时候非常的紧张nervous.
(2)B.推理判断题.根据第二段中的if I am going to ask to be released (免除) from my promise to marry you.可推知他们两个曾经有过婚约,B项正确.
(3)A.推理判断题.根据文章的开头和结尾很显然这是一部小说的节选片段,A项最合理.