Many people think any government's work should be evaluated ______ on citizens' happiness level.
After studying in a medical college for five years, John _______ her job as a doctor in the countryside.
My father warned me _______ going to the West Coast because it was crowded with tourists.
The new movie __________ to be one of the biggest money-makers of all time.
I agree to his suggestion __________ condition that he drops all charges.
All her time __________experiments, she has no time for films.