______, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of English is poor.

The boy was sitting _____ his mother, _____ his back _____ the door

The volunteers kept their hands in hot water __________ they could no longer tolerate the pain.

– Ought he to get down to his workat once— Yes, he _____ought

Victor apologized for ______ to inform me of the change in the plan.