Choose the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following sentences.
19. From 1856 to 1875, a remarkable variety of inventions was produced.
A. collection B. diversity C. number D. limitation
20. If the teacher were here now, we would ask her the difference between “technology” and “science”.
A. indifference B. strength C. similarity D. familiarity
