I_____the problem _____in my mind for a whole week before I did anything about it.

I ______ him to give up smoking, and succeeded.

 He is one of the most excellent students in our class, and he always _____ himself in his studies. 

Now Robert, a football fan in our class, ____ rome of his daily allowance given by his parents in order to buy a new football. 

Science and technology have in important ways __________ the improvement of agricultural production.