Britain is facing a【C1】______rise in its rat population【C2】______growing numbers of people leave fast food scraps in the street,

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问题     Britain is facing a【C1】______rise in its rat population【C2】______growing numbers of people leave fast food scraps in the street, an environment group warned. Keep Britain Tidy said the rodents were【C3】______their traditional haunts underground and were roaming the streets, enticed【C4】______discarded remnants of burgers, pizzas and crisps. "The rat population is【C5】______the rise and soon it’ll be as common to see a rodent on our street【C6】______it is to see a dog or a cat," said group Director, Sue Nelson. The practice of dumping fast food litter and scraps on the street【C7】______in the trash—with young men the worst offenders—was behind the rise.【C8】______to the National Rodent Survey in 2001, Britain’s rat population has grown by nearly one quarter【C9】______1998 and is now【C10】______at 60 million, two million more than the【C11】______population. On【C12】______a rat can give【C13】______every 24~28 days and just a single pair of rats can【C14】______a colony of 2,000 a year. Around 200 Britons a year【C15】______Weil’s Disease—an infection which can【C16】______kidney or liver【C17】______and eventually【C18】______and which is carried in rat’s urine. To【C19】______the issue, Keep Britain Tidy launched a cinema【C20】______entitled "How close do you want them to get?" The ad culminates in a shocking image of a young woman sleeping in a bed of rats—echoing the nightmare scenario from James Herbert’s classic horror tale The Rats, in which mutant rodents begin to prey on humans.
【C9】

选项 A、calculated
B、estimated
C、investigated
D、increased

答案B

解析 上下文题根据上下文此处谈到现在老鼠的数量估计有六千万,calculate“计算,数数”,太具体,意思不符;investigate意思不符;increase常与by/to连用。
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