A group of robbers dug their way into the basement of a bank in Paris and emptied almost 200 private safes(保险箱). They entered the Credit Lyonnais branch using building equipment to dig holes and destroy walls. 小题1: Saturday night, they tied up a security guard and spent 小题2: next nine hours robbing the bank. One investigator described the robbery 小题3: a “professional job”. The robbers came in at about 22:00 on Saturday 小题4: left at 7:00 on Sunday. They entered through the basements of the neighboring building, digging through a series of tunnels and making a hole into a wall of 80 cm thick to get into the bank, 小题5: was having building works at the time. When 小题6: left, the robbers set the place on fire to remove any trace of evidence, switching  on the anti-fire system and flooding the building. Fortunately, the guard escaped unharmed. 小题7: is difficult to estimate the total value of 小题8: was stolen as only the bank’s clients(储户) know the content of their private safes.