My sister, an inexperienced rider, was found sitting on the bicycle to balance it.
A. having tried
B. trying
C. to try
D. tried
网友回答
A. having tried
(答案→)B. trying
C. to try
D. tried
解析：此题考查非谓语动词的用法。句中的空格处动词与主语my sister构成主动关系，即try这个动作是my sister发出的，所以用trying表示她主动“设法/尝试着保持自行车平衡”。