------Tony are you listening to me ？------Sorry sir I to understand what you said just n

问题补充：

------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

答案：

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。