____ some cancers, the best therapy is a combination ____ surgery, radiation, and chemotherapy. 

From the mid-fifteenth century ____, Lisbon began to emerge as a significant market ______slavery.

The modern era of Shakespeare scholarship has been marked _____an enormous amount of investigation _____ the authorship, text, and chronology of his plays.

Despite the official ban _______demonstrations, 2008 has seen Egyptians take to the streets ______massive numbers on several occasions.

The objective ______ a proper diet is to achieve and maintain a desirable body composition and a large capacity _____ physical and mental work.