In fact there are only about three species of tree in the rainforest that have been definitely aged, in terms of their _______. 

It remains the case today that most people in Britain marry and have children and that most marriages last a ________.

The price of a car in East Germany can be a significant proportion of a _______ earnings, and the wait for the car can last a significant part of that lifetime. 

This is possibly the most difficult of all skills and is a _______ study.

The results he achieved in his _________ won Chapman universal acclaim, lifting the obscurity surrounding the office of football manager. 

A small brownish butterfly with a _______ of less than a week and a wingspan shorter than your little finger.

The rules are most useful on formal occasions like weddings, and particularly when they happen only once in a ________.

To make matters worse, because he always does fail in his attempts to improve the situation, the sufferer convinces himself that he has nothing to look forward to but a ________ of misery. 

Now that Lili was here my ________ image of her had become confused. 

This kind of thing happens once in a ________.