BEIJING/SHANGHAI - No annoying drills. Stop the crane. Take a bus instead of driving your car - unless you are taking a student to the national College Entrance Exam. There is no shortage of posters bearing such prohibitions around Beijing in the run-up to the two-day exam period, when high school graduates will compete for places at the country's universities. During China's top test, which starts on Monday, the students are exempt from the nuisances of noise, traffic jams and any other possible disturbances at this crucial moment in their lives. Cities across China have adopted the practice of creating...