She ________a German. She has _______him for three years.

The athlete's years of hard working________when she finally won the Olympic gold medal.

 It is suggested that we should postpone _____ the meeting because the details have not beensettled.

—May I speak to Mr.Smith?—I am afraid not.He is at a meeting now.It's not ________.

 The old scientist took up walking as a regular form of exercise, which, of course, is of great        to his heath.