Several men hit the Sao Paulo Museum of Art just before dawn on December 20th , 2007，and __1__ shocked the authorities as it took the thieves just three minutes to steal paintings __2__ two world— famous artists, Pablo Picasso __3__ Candido Poninari,__4__ are worth millions of dollars. Images from the secret camera show that two men began their action at 5∶09 a. m. ,__5__ the guards in the museum were going through their shift change(换岗). They broke through two glass doors,__6__(run) to the museum’s top floor and grabbed the two paintings from different rooms,somehow __7__(avoid) nearby guards. The alarm never rang,and by 5∶12 a. m. ,they were making their escape. After __8__，the police were interviewing the 30 museum employees. “Everything indicates thieves were sent to do it by some wealthy art lover for __9__ own collection. He was not rich enough to buy the paintings,__10__ he was wealthy,” said the lead police officer,Marcos Gomes de Moura.
1. [解析] 第二分句前有and,说明前后句为并列句，用人称代词it,代替前句内容。[答案] it
4. [解析] 第二分句前无连词，说明此处是非限制性定语从句，用which引导。[答案] which
5. [解析] 引导时间状语从句，意思是：当博物馆的保安换班的时候。[答案] when
6. [解析] broke,ran,grabbed三个动词作并列谓语。[答案] ran
7. [解析] 现在分词作结果状语。[答案] avoiding