It is required that under no circumstances ______ betray ourselves even if there are temptations like money or beauty.
The more one is ______the English-speaking environment, the better he or she will learn the language.
— Have you finished your composition already? — Yes. I ______ it in twenty minutes.
The performance supposed to be popular______ to be a great disappointment after it was over.
Some pictures of the river brought the days back to the day______ they swam in it.
It’s so surprising to hear from my school teacher again. ______, we last met more than twenty years ago.