题目内容：

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.

1.        Saturday night, they tied up a security guard and spent 2.        next nine hours robbing the bank.

One investigator described the robbery 3.        a “professional job”. The robbers came in at about 22:00 on Saturday 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, 5.        was having building works at the time.

         When 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.

7.         is difficult to estimate the total value of 8.        was stolen as only the bank’s clients(储户) know the content of their private safes.