------Tony, are you listening to me ？
------Sorry sir, I to understand what you said just now.
A. try
B. was trying
C. tried
D. have tried
网友回答
A. try
(答案→)B. was trying
C. tried
D. have tried
解析：句意：---托尼，你听我说吗？---对不起，先生，我正在理解你刚才说的话。由题干的语境可以看出，此处应是说话者刚刚正在尽力想做某事，因此用过去进行时，故选B。
考点: 考查动词时态的用法。