----Are you happy with your new computer? ----- No, it is _______ me a lot of trouble.

Geography is the study of the countries of the world and of such things ______ the land, seas, climate, towns, and population. 

 It is ten years since we ________ each other last time.  

As time _______, you’ll learn more.

The boy is seriously injured. So he is supposed _________ to hospital as soon as possible.