New medicines and instruments ______ every day to extend life.
You can't see the___________ now for they are having a meeting at the moment.
He is very popular among his students as he always tries to make them __________ in his lectures.
The children went home from the grammar school, their lessons __________ for the day.
__________ by a greater demand of vegetables, farmers have built more green houses.
The flowers his friend gave him will die unless __________ every day.