第二节 语法填空（共10小题; 每小题1.5分，满分15分）
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷标号为31~40的相应位置上。
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    31   (equip) to dig holes and destroy walls    32    Saturday night. They tied up a security guard and spent    33    next nine hours robbing the bank.
One investigator described the robbery    34    a “professional job”. The robbers came in at about 22:00 on Saturday    35    left at 07:00 on Sunday. They entered through the basements of the neighbouring building, digging through a series of tunnels and making a hole into a wall of 80 cm thick to get into the bank,    36    was having building works at the time.
When they left, the robbers set the place on fire to remove any trace of evidence,
???   37   (switch) on the anti-fire system and flooding the building.    38   (fortune), the guard escaped unharmed.
39    is difficult to estimate(估计) the total value of what    40   (steal) as only the bank’s clients(储户) know the content of their private safes.