---Do you know when she _________?---Sorry, I don’t. But I’ll let you know when she _________.
It may have been at Christmas _____ John gave Mary a handbag.
_____ was very ______ that little Jim wrote the letter.
What is it _____ his daughter needs most?
Who was it _____ saved the drowning girl?
“How was ______ they discovered the entrance to the underground palace?” “Totally by chance.”