differ, difference, different a. Mary and Jane are from each other although they are identical twins. b. His office ___________ from mine in size and decoration. 2. add, addition, additional a. In to English, he would like to study French. b. You would be responsible for any cost involved. 3. publish, publishing, publication a. The list of new __________ is enclosed. b. He used to be a teacher, but now he works in a __________ house. 4. economy, economical, economic a. The __________ crisis affected most of the developed countries. b. A small car is more ___________ than a large one because the former uses less gas. 5. frequency, frequent, frequently a. She is a __________ customer of this restaurant. b. The __________ of accidents on that road made the government lower the speed limit.
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