From the course of human development, the ultimate aim of the human race is to pursue the spiritual joy based on ______ materials.
Only when class began _____ that he had left his book at home.
Nothing can stop a _____ student _____ his mind to give up his studies.
—Are you _____ with the achievements you have made recently? —Of course, they show my efforts at least.
_____ we move the picture over there? Do you think it’ll look better?
_________ that he had fallen behind, he tried to work harder.