The rat has many enemies and its greatest enemy is man. Neverthe

The rat has many enemies and its greatest enemy is man. Nevertheless, it is the survivor. Although man has 1_______ an unending war against them, rats have 2_______ the world. In almost every country, from the 3_______ cold of the Arctic regions to the unbearable 4_______ of the tropics, rats are 5_______ thriving, increasing and multiplying.
Apart from their ability to 6_______ themselves to varying climate conditions, rats possess another 7_______ that gives them an advantage in extending their boundaries. More so than most other animals, 8_______ snakes, mosquitoes and spiders, they induce fear. Why should this be so? Certainly they carry 9_______ and man is slow to forget the Black Plague 10_______ killed off millions of people in the fourteenth century. Also, rats have been known to bite 11_______ babies, but the number of such attacks is very much exaggerated. One reads 12_______ the danger of being attacked by “a cornered rat", but this belongs to fiction. Rats do not 13_______ your throat, as many would have us believe. 14_______,it is difficult to believe that its appearance can be a source of 15_______ the common black or brown rat can almost be regarded as a frightful creature while its cousin, the squirrel, is quite pretty and gentle.
4
A、warmth
B、animals
C、heat
D、weather
【正确答案】：C
【题目解析】：根据上题解析，这里是用两种极端的天气情况来说明老鼠的蔓延情况，所以这里应该填cold的反义词heat,它们在这里都用作名词。答案为C。