We have been told that under no circumstances ___ the telephone in the office for personal affairs.

Once ________ at a table, left-handers need to move the water glasses put on the right side to their more convenient left side.

So interested in the ancient town _______ that they decided to stay there for another few days.

So difficult __________ it to adapt to the academic requirements of a Western university that I determined to take a preparation course. 

Only when he apologizes for his rudeness _____ to him again.