The flight was postponed because of technical problems and was finally canceled last week when a ______ was discovered.
A: accident
B: defect
C: damage
D: defeat
                    A: accident
B: defect
C: damage
D: defeat
举一反三
- The flight was postponed because of technical problems and was finally cancelled last week when a ______ was discovered.
 - Last week two engineers ______ to help solve the technical problems of the project.
 - Their arrival will be ______ because of heavy traffic. A: postponed B: delayed C: canceled D: blocked
 - In the accident at the air show last week, a pilot and 10 ________ were killed when a fighter plane crashed into the crowd.
 - He had a serious car (accident) last week and (broke) his left leg because he got (drunk) and drove too (fastly). A: accident B: broke C: drunk D: fastly
 
