After Tom had finished some paper work, he ______ interviewing the applicants.
The police were seeking more information to find out ______ the rich merchant.
_____ puzzles me most is that I don’t know ______ the difference between the two lies.
Determination is a kind of basic quality and this is _____ it takes to do jobs well.
_________anyone should want to kill her was unbelievable.
-----Alice looks blue today. -----Yes, I asked her, but she wouldn’t say _____ troubled her.