— I regret _______ you that you failed the exam.— How I regret _______ so much time playing computer games.
At last they got the letter they____________.
__________the top of the pagoda(塔),the scenery of the whole city can be seen clearly under your feet.
When I visited the city of Rome,I found the buildings,squares and parks _____________in very different styles.
He came to the meeting _____________his serious illness.
The professor said that your discovery was_____________.