We are still at the airport. If it weren’t for the delayed flight, we _____ the concert right now.
29. On March 12, the students were planting trees ____ the classroom.
30. Once Jerry is back of you, there will be nothing halfway. The underlined part probably means _____.
31. Don't throw out the _____ with the bath water.(prov.)
32. According to the regulation, all _____ should be examined before boarding a plane.
33. Yan'an used to be a revolutionary _____ for the Red Army.