Question

【題目】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】本文介紹了北極熊賴以生存的北極冰正在融化，這威脅著它們的生活環(huán)境。

【1】考查名詞。可數(shù)名詞animal（動物）泛指，要用復數(shù)形式，作介詞for的賓語。故填animals.

【2】考查形容詞。形容詞frozen（冰封的）作定語，修飾名詞Arctic sea ice，故填frozen.

【3】考查關(guān)系代詞。定語從句，先行詞是danger （危險），要用關(guān)系代詞that / which在從句中作語，故填that / which.

【4】考查時態(tài)。有時間狀語since l978（自從1978年），所以要用現(xiàn)在完成時態(tài)：has reduced，故填has reduced.

【5】考查動詞。名詞 survival（幸存）作介詞for的賓語。故填survival.

【6】考查連詞。句意：海冰不僅僅是熊走過的這個平臺。固定詞組：more than（不僅僅），故填than.

【7】考查代詞。句意：沒有它，北極熊就不能生存。用代詞it代替上文提到的The sea ice（海冰）故填it.

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

【9】考查形容詞。句意：但是在一個溫暖的世界里，這些周期加快，而熊就有更少的時間去打獵了。根據(jù)句意要用比較級less（更少），故填less.

【10】考查副詞。句意：這個平臺過后就會被用到。副詞later（后來，過后）作狀語，故填later.