【题目】My sister, an inexperienced rider, was found sitting on the bicycle ______to balance it.
A.having tried
B.trying
C.to try
D.tried

【答案】B
【解析】【分析 】这题考查不定式做目的状语的用法：句意是：有人看见骑车很不熟练的我姐姐正坐在自行车上尽力的想保持平衡。选B。