Every year landslides {滑坡} cause 25 to 50 deaths and $1.5 billion in damage in the United

Every year landslides {滑坡} cause 25 to 50 deaths and $1.5 billion in damage in the United States．They account for 15 percent of the deaths from natural disasters in Europe．And in Decem­ber, a single event killed more than 200 people in the Philippines．Sending workers to stabilize (加固) mountainsides using steel bars and cement (水泥) can help prevent disaster, but it introduces new difficulties．Shaking drills produce harmful dust and loosen heavy, dangerous debris (米屑)．It's quite a risky job, says Giorgio Pezzuto of D'Appolonia, an engineering pany in Italy.
D'Appolonia, working with eight other panies, may have an answer:  a three-ton robot called Roboclimber．The idea is to operate a machine far away that can drill without a hu­man being on board,' says Pezzuto, manager for the project, which is supported by the European Commission．Engineers claim that the machine will be faster and cheaper than manual labor．The robot, a large radio-controlled four-legged me­chanical spider (蜘蛛), has cost at least $2 mil­lion so far．The final product should be able to climb unstable mountainsides, drill holes, insert bars and cement, and collect data on the slope' s stability．Testing should begin in May.
【小题1】The underlined word event (in Paragraph l) refers to     .A．landslideB．machineC．earthquakeD．flood【小题2】The purpose in writing this text is     ..A．to tell people how serious the damage caused by landslides isB．to tell people that sending workers to sta­bilize mountainsides is a risky jobC．to introduce a product that can be used to stabilize mountainsidesD．to show people how to use a new product【小题3】What does the robot look like? A．A human being．B．A spider．C．A truck．D．A drill．【小题4】The biggest advantage of this product is that    .A．it will be faster and cheaper than manual labor B．it can climb mountainsides, drill holes, insert bars and cementC．it can collect data on the slope’s stability D．it can drill without a human being on boardA