(2019·全国卷Ⅰ)ThepolarbearisfoundintheArcticCircleandsomeb...

问题详情：

(2019·全国卷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 __1__  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 __2__ (poor) studied; however, biologists calculate that there are about 20,000­25,000 polar bears worldwide.

Modern methods __3__ tracking polar bear populations have been employed only since the mid­1980s, and are expensive __4__ (perform) consistently over a large area. In recent years some Inuit people in Nunavut __5__ (report) increases in bear sightings around human settlements, leading to a __6__  (believe) that populations are increasing. Scientists have responded by __7__ (note) that hungry bears may be congregating (聚集) around human settlements, leading to the illusion (错觉) that populations are __8__ (high) than they actually are.  Of __9__  nineteen recognized polar bear subpopulations, three are declining, six __10__ (be) stable, one is increasing, and nine lack enough data.

1．________　2.________　3.________　4.________

5．________　6.________　7.________　8.________

9．________　10.________

【回答】

篇章导读：本文是一篇说明文。文章介绍了北极熊种群数量越来越少、亟须保护的现状。

1．that　考查同位语从句的连接词。分析句子结构可知，所填词引导同位语从句，解释说明evidence的具体内容，从句中不缺少成分且意义完整，故用that引导。

2．poorly　考查词*转换。修饰动词studied应用形容词poor的副词形式poorly。

3．of/for　考查介词。a method of/for doing sth. “做某事的方法”。

4．to perform　考查非谓语动词。此处是“主语＋be＋adj.＋不定式”结构，不定式用主动形式表示被动含义。

5．have reported　考查动词的时态。根据句中的时间状语“in recent years”可判断用现在完成时。

6．belief　考查词*转换。根据空格前的不定冠词a可知，此处应填believe的名词形式belief。

7．noting　考查非谓语动词。介词后接动词时，应用其动名词形式。respond by doing sth. “通过做某事回应”。

8．higher　考查形容词的比较级。根据空格后的than可知，此处应用high的比较级形式higher。

9．the　考查冠词。此处特指确认的19个亚种群，故用定冠词the。

10．are　考查动词的时态和主谓一致。此处陈述客观事实，应用一般现在时；six指代six polar bear subpopulations，谓语动词应用复数。

知识点：语法填空

题型：阅读填空