— Is your father or mother a teachers? —            . My father is a doctor and my mother is an office worker.

—Would you like to tell me about the travel? —Great. I really experienced ________.

 Of all the methods they provided, ________ is of any help for solving the math problem.

Does ______  matter if he can’t arrive here on time? 

  (2012·南宁高二检测) He didn’t make _______ clear when and where the meeting would be held.