Question

【题目】Polar bears live in environments too cold for most【1】(animal).For much of the year,they live and hunt on the 【2】(freeze) Arctic sea ice.Nature has prepared them for the cold conditions.But nothing has prepared the bears for the danger【3】threatens the only home they know.

The polar bears' world is melting.Studies show that the polar ice【4】(reduce) by 9.8% every 10 years since l978.Now about 20,000 to 25,000 polar bears live in the Arctic.Polar bears depend on the sea ice for their【5】 (survive)."The sea ice is more【6】just this platform that the bears walk over,"says Andrew Derocher,a scientist who studies North American polar bear populations."Without【7】,they can't exist."

Some melting and refreezing of the polar ice is【8】(nature).But in a warmer world,these cycles speed up,and bears have【9】(little) time to hunt.Normally,they have three months in the spring when they gain more weight.The extra fat is used【10】(late),when the bears are not actively hunting.

Answer 1

【答案】

【1】animals

【2】frozen

【3】that / which

【4】has reduced

【5】survival

【6】than

【7】it

【8】natural

【9】less

【10】later

【解析】本文介绍了北极熊赖以生存的北极冰正在融化，这威胁着它们的生活环境。

【1】考查名词。可数名词animal（动物）泛指，要用复数形式，作介词for的宾语。故填animals.

【2】考查形容词。形容词frozen（冰封的）作定语，修饰名词Arctic sea ice，故填frozen.

【3】考查关系代词。定语从句，先行词是danger （危险），要用关系代词that / which在从句中作语，故填that / which.

【4】考查时态。有时间状语since l978（自从1978年），所以要用现在完成时态：has reduced，故填has reduced.

【5】考查动词。名词 survival（幸存）作介词for的宾语。故填survival.

【6】考查连词。句意：海冰不仅仅是熊走过的这个平台。固定词组：more than（不仅仅），故填than.

【7】考查代词。句意：没有它，北极熊就不能生存。用代词it代替上文提到的The sea ice（海冰）故填it.

【8】考查形容词。形容词natural（自然的）作表语，故填natural.

【9】考查形容词。句意：但是在一个温暖的世界里，这些周期加快，而熊就有更少的时间去打猎了。根据句意要用比较级less（更少），故填less.

【10】考查副词。句意：这个平台过后就会被用到。副词later（后来，过后）作状语，故填later.