.第一单元1. Hundreds of workers sat（ idle ） on the factory floor waiting for the assembly line to start again. 2. To some of our problems there was more than one right answer, so we were looking at the students reasoning as to how they got it and if they could （ justify ） the answer they had. 3. Consumers expect to find the brand available at a(n)（discount） and are unpleasantly surprised to find a higher price. 4. The European Union is made up of 27
