Not once________to Michael that he could one day become a top student in his class.
He stayed up too late every night,______ to catch up with his classmates.
Exercise is _______ as any other to lose unwanted weight.
______known to us,_______ increasing number of students are buried in their studies.
Not until _____,_______the diffiult problem.
She started singing to the baby and was ____ with a smile.