You’ll succeed in the end __________ you don’t give up halfway. [ ]

The manager says he needs an assistant to ________ to deal with the problems that may occur in his absence.[ ]

It _____ we had stayed together for a couple of weeks _____ I found we had a lot in common. [ ]

Waste paper shouldn’t everywhere. We should keep our school clean.

What a great artist! It seemed only a couple ofminutes ____ he had finished this wonderful painting!