I left my pen on the desk and now it’s gone; who _____ it?
In no place other than Britain ____ experience four seasons in a single day.
_____ occurred to me that the murder happened ____ a rainy day.
It was ______ the old worker came that we______ the experiment.
In no city of China ______ little about the economic development.
---- ______ he dropped out of school?----His family had run into financial difficulties.A. Why was it that B. Why was thatC. Why was that it C. Why was it