Tom killed the cat. I’ll ask him why _______.
As a new graduate,he doesn't know ________it takes to start a business here.
The snow lasted a week, ________a serious traffic confusion in the whole area.
About________of the workers in that steel works________ young people.
--- Did you tell Julia about the result? ---Oh, no, I forgot. I _____ her now.
_____ is known to us all that the sun rises in the east.