Only when we failed ________ the importance of study.
It will be at least three weeks________ he recovers from his illness and returns to work.
He found his house broken into and many things stolen _______ his return from office.
Making good friends is no ________ important to us than choosing a good job; we should take both of them seriously.
The police are trying to find out the ________ of the man killed in the traffic accident.
There are only ten minutes left; can we walk ___________?