选词填空
Many wild animals have ________because people have destroyed their living environment. We have to take some actions to prevent the  ________ of wild animals.( disappearance; disappear)
The new motorway between the two cities has finally  ________. It’s good news for people who have to travel a lot there. The manager made a speech at the _ceremony of the supermarket (open; opening)
Thanks to his ________,we are all saved, and all of us think he is really a  ________ person (kind; kindness)
The man carried the boy to ________as the train came over, and the boy was at last. (safe; safety)
The declines can be traced to a  ________of factors.
The judge gave  ________cases in support of his opinion (various; variety)