10．A group of robbers dug their way into the basement of a bank in Paris and emptied almost 200private safes（保险箱）． They entered the Credit Lyonnais branch using building （41）equipment （equip） to dig holes and destroy walls （42）on Saturday night．They tied up a security guard and spent （43）the next nine hours robbing the bank． One investigator described the robbery （44）as a"professional job"．The robbers came in at about 22：00on Saturday （45）and left at 07：00on Sunday．They entered through the basements of the neighbouring building，digging through a series of tunnels and making a hole into a wall of 80cm thick to get into the bank，（46）whichwas having building works at the time． When they left，the robbers set the place on fire to remove any trace of evidence，（47）switching （switch） on the anti-fire system and flooding the building．（48）Fortunately（fortune），the guard escaped unharmed． （49）It is difficult to estimate（估计） the total value of what （50）was stolen（steal） as only the bank's clients（储户） know the content of their private safes．
