It is many years ____ we enjoyed ourselves on the great occasion.
As far as we know, traveling in space has been made with the development of science and technology.
After reporting the accident to the police, the couple hurried off and in the crowd.
So far there is no proof people from other planets do exist.
Color shapes our view of world and it may have far greater influence on our lives than many of us realize.
There is still much room for improvement in our work, I see it.