Ask special questions to underlined words. I got (my) university (degree) last month. Bill was writing (a letter) at this time (yesterday). (We) have just managed to talk to the (headmaster).

What university degree did you get?
What was Bill writing at this time yesterday?
Who has just managed to talk to the headmaster?
What did you get?
When was Bill was writing a letter?
Who have you just managed to talk to?