Question

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

1. A.
   try
2. B.
   was trying
3. C.
   tried
4. D.
   have tried

Answer 1

B
试题分析：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。