问题

It was a rare occasion________my badtempered father reacted calmly to such a situation. [ ]
A: who
B: which
C: why
D: when
B: which
C: why
D: when
正确答案是:
同类题型
Tom’s father didn’t____ him to join the school football team.[ ]
She felt disappointed when she found out they had gone swimming____ her
There are many people here. Some are taking photos. ________ are talking happily.
I like English very much. I think it’s a little ____than math.
While in London, we paid a visit to the hospital founded ______ the nurse Florence Nightingale.