Ben isn’t qualified for the Job. He has… ........... Experience.

The new office block should .......... by the spring, so we can move in before the summer break starts.

The issue we need to concentrate ........... here is very serious.

The English teacher...............we saw yesterday is very good at his job.

Professor Harris has been reading in his office ...................... eight hours without taking a break.

I'm ready to submit my term paper. I ...... on it for a month.