___ to give up smoking, he threw away his _____ cigarettes.
It’s really difficult to ______ what he is trying to express.
This camera is of good quality. If it ______ break down within the first year, we would replace it with a new one.
As a green hand, he doesn’t know______ it takes to start a business here.
He is looking for a job, ______ where he can make the most of his talent.
When interviewed, the family members of the victims said that they didn’t know what ______ without their loved ones.