【题目】I’m afraid I you with a great many questions. Thank you a lot, sir.
A. have bothered B. appreciated
C. have contacted D. impressed
在线课程【答案】A
【解析】考查动词时态。A. have bothered麻烦；B. appreciated欣赏，感激；C. have contacted交往，接触；D. impressed铭记。句意：恐怕我已经麻烦了你许多问题，非常感谢您。此处指已经问了许多问题，动作已经完成用现在完成时，故选A.