The utility model makes it possible to increase the guaranteed operating ______ of a unit for purifying gases of acid components.

He demonstrated bacterial variability and adaptability and formulated his _______ belief that disease-producing organisms had evolved from non-pathogenic ancestors. 

Marriage is designed and intended to be a _________ one-flesh relationship. 

Although humans may have the longest _________ of any mammal, giant tortoises have the longest recorded lives among vertebrates.

Margaret Butterworth developed a ________ concern for social care after living and working with mentally ill young people after the war. 

People make many different commitments in the course of a _________.

It was the story of a ________, the story I had been born for. 

To acquire the art of field cultivation is a ________ work.

Patricia enjoyed the kind of Anglo-Irish childhood so well described by her _______ friend Molly Keane.

He envisaged marriage, a ________ commitment, growing richer as time passed.