There have been so many school bus accidents recently._________, people are concerned about the school bus safety much.
We won't know whether it will be successful. We won't know whether there will be good _____.
It has always been the _____ of our firm to encourage workers to take part in social activities.
The most important _____ of his speech was that we should all work whole-heartedly for the people.
When I worked as the general manager of the firm, I sometimes had _____ to visit London on business.
As civilization______, more and more people have realized the importance of preserving rare animals from extinction.