I was just chatting with the director when a stranger ________.
---I was trying to carry out the plan, but I failed.---Well, you _____, for we were uncertain it would do ____.
It was foolish of him to ____his notes during such an important test, and as a result, he got punished.
Many a man and many a woman _____ that he or she had better education.
_____ it is _____ you obtain, you should share _____ your parents your feelings.
About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.