单元限时训练(3) B卷 Unit 3 The world Online（Word练习）-【优化指导】2023-2024学年新教材高中英语必修第三册（译林版2020）

单元限时训练(三)　B卷 [对应学生用书P206] (限时40分钟) Ⅰ.语法填空 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 20,000～25,000 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. [语篇解读]　从20世纪80年代开始，人们才开始使用现代的方法保护北极熊种群。生物学家计算出全世界大约有20 000～25 000只北极熊。北极熊的数量正在下降。 1．that　[考查名词性从句。本句含有一个同位语从句，解释了名词evidence“证据”的具体内容，空处在从句中不充当成分，也无意义，故本空填连接代词that。] 2．poorly　[考查词性转换。应用副词poorly修饰动词studied。] 3．of/for　[考查介词。名词method后接介词of/for，表示“……的方法”。] 4．to perform　[考查非谓语动词。本句含有“主语＋be＋adj.＋不定式”结构，主语通常是不定式动作的承受者，不定式用主动形式表示被动含义。] 5．have reported　[考查时态和主谓一致。句中的时间状语In recent years多与现在完成时连用，主语some Inuit people为复数意义，因此本空填have reported。] 6．belief　[考查词性转换。根据空前的a可知，短语leading to后接的是名词，作宾语，故本空填belief。] 7．noting　[考查非谓语动词。在介词by后，应用动名词作宾语，故本空填noting。] 8．higher　[考查比较级。根据空后的连词than可知，本句表示比较意义，因此本空应填higher。] 9．the　[考查冠词。Of the nineteen recognized polar bear subpopulations“在这19个已知的北极熊亚种群当中”，本空应填定冠词the，表示特指。] 10．are　[考查时态和主谓一致。本句其他谓语用了一般现在时，本句的主语six指代six polar bear subpopulations，表示复数意义，故本空应填谓语动词are。] Ⅱ.