Time goes by so fast . We must never miss the chance to show love for our parents and make them _____ how much they mean to us .
_________trees have been planted near, so the air is very fresh.
The TV play ___________for ten minutes when I turned on the TV.
The new library building ___________last week.
The math problem was _________ difficult __________ none of us worked it out.
The CD is too noisy. Would you please__________ a little?