Though we have been staying up for days, there’s still _____ work remaining to be done.

It is said that our eyes, we can see more than 2000 stars on a clear night.

Was it ______ the international conference that made the city the focus of this area?[ ]

Bill opened the door to Harold and ________ him with cries of welcome.[ ]

Companies are now using computers to help them ________ new workers.[ ]