The specialist, ______ some of his assistants, ____ to attend our discussion.

Modern teaching equipment as well as some computers _______ to the village school last week.

Twenty years _____ passed since I came to this school, but I feel twenty years _____a short time in my life. 

A great number of people were killed in the big fire, and the number of the people who _____ missing _______still increasing.

The country’s population     small, and most of its population      in the mountainous areas.