A number of new machines were introduced from abroad,______ an increase in production.
We had a wonderful performance in the annual school sports meeting. Not only ___ in the coming relay race, but also we were the runner-up of the tug-of-war.
___ is the most useful invention?
We know such people are not ___.
The article gave a ____ description of South America.
In my opinion, life in the twenty-first century is much easier than ____.