We should take care of the blind. It is immoral to _______ them.
As is often said, a friend is to man_____ water is to fish.
To his disappointment, the opinion he had held____ out wrong.
—My son has got a straight A in all his final exams.— What a ____ boy! Congratulations!
We should try all means to ensure ourselves_____ all possible risks.
Can you tell me_____ difficult the exam turns out to be?