
北极熊
(2019全国I)
The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland. While they are rare north of 88°, there is evidence ___61___ they range all the way across the Arctic, and as far south as James Bay in Canada. It is difficult to figure out a global population of polar bears as much of the range has been poorly studied; however, biologists calculate that there are about 20,000-25,000 polar bears worldwide.
Modem methods of/for tracking polar bear populations have been employed only since the mid-1980s, and are expensive ___64___ (perform) consistently over a large area. In recent years some Inuit people in Nunayut ___65___ (report) increases in bear sightings around human settlements, leading to a belief) that populations are increasing. Scientists have responded by noting that hungry bears may be congregating(聚集) around human settlements, leading to the illusion(错觉) that populations are ___68___ higher than they actually are. Of ___69___ nineteen recognized polar bear subpopulations, three are declining, six ___70___ (be) stable, one is increasing, and nine lack enough data.
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详解及拓展笔记:
1.that引导的同位语从句用在某些抽象名词(如:news, fact, problem, evidence, idea, thought, hope, desire, suggestion, possibility等)之后,对前面的名词起补充说明的作用,that只起连接作用,在从句中不充当成分,一般不省略。
There’s a feeling in me that we’ll meet again.
2.(2016江苏完形填空)
He was offering a ______ for us to change our lives and achieve our dreams.
A.tool B. method+for/of C. way D. rule
3.(2020全国II)They are easy to care for and make great presents.
不定式放在表示性质或特征的形容词后做状语,用主动式
easy, hard, difficult, important, impossible, interesting, pleasant, nice, comfortable, safe, dangerous...+to do
This question is easy _____(answer).
I hope that my dad is as easy _____(please) as my mom, who is always delighted with perfume.
He is hard _____(get) along with.
3.现在完成时表示已完成:already, yet, just, now;
现在完成时表示延续:since, for, recently, lately, up to now, so far, in/during/over the last/past 5 years, how long;
现在完成时表示经历:before, ever, never, once, twice, three times;
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