1选择题
Read the sentences below and choose the best answer. Pay attention to the difference between the superlative degree and other degrees of adjectives.
Which of the following sentences is correct?
- A. Qomolangma is highest mountain in the world.
- B. Qomolangma is the higher mountain in the world.
- C. Qomolangma is the highest mountain in the world.
- D. Qomolangma is the most high mountain in the world.
答案：C
解析：本题考查最高级的正确表达，属于概念辨析题。A项漏写the，最高级前必须加the，是最高频错误；B项用比较级higher，而句中比较范围是「in the world」（三者以上），必须用最高级，且比较级前一般不加the（除非特指两者中较……的一个）；D项high是单音节形容词，直接加-est构成最高级，不用most high，属于形容词最高级变错的典型问题。C项the highest mountain in the world结构完整、正确。故选C。
2选择题
阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
Qomolangma is the highest mountain in the world. It is about 8,848 meters high, and many climbers want to reach its top. However, the air there is very thin, so the climb is dangerous. The Nile is the longest river in the world. It runs through several countries in Africa and finally goes into the Mediterranean Sea. The Caspian Sea is the deepest of all the salt lakes in the world.
Which of the following statements is TRUE according to the passage?
- A. Qomolangma is about 8,848 meters deep.
- B. The Nile is the longest river in Africa.
- C. The air on Qomolangma is thin and the climb is dangerous.
- D. The Caspian Sea is the deepest lake in the world.
答案：C
解析：本题考查对地理之最短文细节的准确辨析。A 项偷换概念：文中说 Qomolangma 是 8,848 meters high（高），而非 deep（深），high 与 deep 混淆是常见陷阱；B 项扩大范围：文中说 the longest river in the world（世界上最长的河），并非只是 in Africa，且 Nile 流经多个国家，不能缩小为非洲最长；D 项少了限定：文中是 the deepest of all the salt lakes（所有盐湖中最深），而非所有湖泊（lake）中最深，范围不同即错误。C 项与原文“the air there is very thin, so the climb is dangerous”完全一致。故选C。
3选择题
阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
Qomolangma is the highest mountain in the world. It rises about 8,844 meters above sea level. Every year, hundreds of climbers try to reach its top. The air near the top is very thin, and the weather can change very quickly. Many people describe the mountain as the most dangerous place on earth. However, the mountain is so amazing that thousands of visitors travel to its base camp each year just to see it. Climbing Qomolangma is not only a test of strength but also a test of mind.
Which of the following sentences uses "so...that..." correctly to show a result?
- A. Qomolangma is so high mountain that few people can reach its top.
- B. Qomolangma is so high that few people can reach its top.
- C. Qomolangma is such high that few people can reach its top.
- D. Qomolangma is so high that in order to few people reach its top.
答案：B
解析：本题考查 so...that... 引导结果状语从句的正确形式。so 是副词，后面接形容词或副词原级，即 so + adj./adv. + that 从句，表示“如此……以至于……”。B 项 "so high that..." 结构正确，that 后接完整的结果状语从句，符合用法。A 项错在 so 后误接了名词短语 "high mountain"，so 不能直接修饰“形容词+名词”，若要用名词应改用 such，即 such a high mountain that...；C 项错在 such 后接了形容词 high，such 应修饰名词（such a high mountain that）；D 项错在 that 从句中混入了 in order to（目的状语），把结果从句写成了目的状语，语义和结构均混乱。易错点：一是混淆 so...that（结果）与 so that（目的，后接完整从句表“以便”）；二是混淆 so + adj./adv. 与 such + (a/an) + n. 的结构。故选B。
4填空题
根据句意，用括号内所给词的适当形式填空，使句意完整、语法正确。
1. The Nile is ______ (long) river in the world. It is about 6,670 kilometers long.
2. The story of the young climber is ______ moving ______ many readers decided to write letters to her.（用 so...that... 结构填空）
3. The teacher encouraged the students ______ (search) for more information about the world's deepest lake.
4. The boy is too young ______ (remember) all the names of the world's highest mountains.
5. Mariana Trench is so deep that it is ______ (deep) place in the ocean.
答案：1. the longest
2. so; that
3. to search
4. to remember
5. the deepest
解析：本题综合考查最高级、so...that... 结果状语从句、不定式作宾语补足语以及句式转换，均属本单元重点。
1. 考查形容词最高级：long 的最高级为 longest，表示“世界上最长的河”，最高级前必须加 the，故填 the longest。易错点：漏写 the，或误写为 longer。
2. 考查 so...that... 结构：中心词 moving 是形容词，用 so + adj. + that 从句，故填 so; that。易错点：误用 such...that（such 后应接名词），或误用 so that 表目的。
3. 考查不定式作宾语补足语：encourage sb. to do sth. 是固定结构，故填 to search。易错点：受使役动词 let/make/have 及感官动词 see/hear 后省略 to 的影响而漏写 to。
4. 考查不定式作状语：too...to... 结构中 to 后接动词原形，故填 to remember。易错点：误写为 remembering 或 to remembering。
5. 考查形容词最高级：deep 的最高级为 deepest，且为最高级需加 the，故填 the deepest。易错点：误写为 deeper，或漏写 the。
5解答题
Complete the following sentences with the correct form of the words in brackets, and pay attention to the use of the superlative degree of adjectives.
1. Qomolangma is ______ (high) mountain in the world.
2. The Nile is ______ (long) river in Africa.
3. The Caspian Sea is ______ (deep) of all the salt lakes in the world.
4. Of the three boys, Tom runs ______ (fast).
5. This is ______ (good) book I have ever read about geography.
Then explain in English why we must use "the" before a superlative adjective in each sentence above.
答案：1. the highest 2. the longest 3. the deepest 4. the fastest 5. the best
Explanation: In English, when we talk about the best, the tallest, the longest or the deepest one among three or more things, we use the superlative degree of the adjective, and the definite article "the" must be put before it. "The" shows that the noun is unique in the range we are talking about, such as "in the world" or "of the three boys". Without "the", the superlative form is ungrammatical in this use.
解析：本题考查形容词最高级的构成与the的使用，紧扣「What's the highest mountain?」地理之最话题。第1、2、3题为规则变化（直接加-est，注意high→highest、long→longest、deep→deepest），第4题fast为单音节直接加-est，第5题good为不规则变化good→better→best，属于易错点。所有空都必须填「the + 最高级」，漏写the是最常见的失分点。后半问答要求用英文说明原因，避免学生只会填空不会说理。注意：deep的比较范围是「of all the salt lakes」，也是最高级的典型标志。
6解答题
根据括号内所给词的适当形式填空，或用最高级完成句子，注意形容词最高级前须加 the。
1. Qomolangma is ______ (high) mountain in the world.
2. The Nile is much ______ (long) than the Yellow River.
3. The Caspian Sea is ______ (deep) of all the salt lakes in the world.
4. Of the three rivers, the Yangtze River is ______ (long).
5. — What is ______ (deep) ocean in the world? — The Pacific Ocean.
答案：1. the highest 2. longer 3. the deepest 4. the longest 5. the deepest
解析示例（供批改参考）：
1. 句意为“珠穆朗玛峰是世界上最高的山”，表示“最……”用最高级，high 的最高级为 highest，前面必须加 the，故填 the highest。
2. 句中有 than，须用比较级，long 的比较级为 longer，故填 longer。
3. 表示“在所有盐湖中最深的”，用最高级 the deepest。
4. 三者比较用最高级 the longest。
5. 提问“最深的海洋是哪一个”，用最高级 the deepest。
解析：本题集中考查形容词比较级与最高级的概念辨析。易错点：① 最高级前漏写 the，如误填 highest；② 看到 than 仍误用最高级，如第 2 题误填 longest；③ 拼写变化错误，如 long 写成 longger、deep 写成 deepest 时丢字母；④ 忽略比较范围：三者或三者以上（of all / of the three）用最高级，两者比较（than）用比较级。判断突破口是抓关键词：than → 比较级；in the world / of all / of the three → 最高级 + the。
7解答题
用括号内所给词的适当形式填空，并根据中文提示完成句子。
1. Qomolangma is ______ (high) mountain in the world.
2. The Nile is much ______ (long) than the Yellow River, but the Amazon carries ______ (much) water of all the rivers on the earth.
3. The Mariana Trench is the ______ (deep) place in the ocean.（用 deep 的适当形式填空）
4. ______（在世界上）, the Sahara is the largest hot desert.
5. — What's ______ (long) river in the world? — The Nile.
答案：1. the highest
2. longer; the most
3. deepest
4. In the world
5. the longest
完整答案：
1. Qomolangma is the highest mountain in the world.
2. The Nile is much longer than the Yellow River, but the Amazon carries the most water of all the rivers on the earth.
3. The Mariana Trench is the deepest place in the ocean.
4. In the world, the Sahara is the largest hot desert.
5. — What's the longest river in the world? — The Nile.
解析：本题考查形容词最高级的构成与用法，属于基础题。
1. high 是单音节词，最高级为 highest，且最高级前必须加 the，故填 the highest。易错点：漏写 the。
2. much 后接比较级 longer（than 提示比较级）；of all 表示三者以上范围，用最高级 the most（much 的最高级形式）。易错点：把 much 的最高级写成 mostest 或 more。
3. deep 是单音节词，最高级直接加 -est，变 y 为 i 的规则不适用（deep 无 y 结尾），故为 deepest。易错点：误写为 deepst 或 deepiest。
4. 「在世界上」固定短语为 in the world，用于限定最高级的比较范围。易错点：写成 on the world。
5. 提问世界之最用 What's the + 最高级 + 名词 + in the world?，故填 the longest。易错点：漏掉 the，或误用 longer。
8解答题
按要求完成下列各题，注意比较结构和连词的正确使用。
1. 合并句子：Qomolangma is very high. It is higher than any other mountain in the world.（用最高级合并为一句）
2. 改错（每句有一处错误，请指出并改正）：
(1) Qomolangma is highest mountain in the world.
(2) While I read the article about the Nile, my sister was watching TV.
3. 用 when 或 while 填空：
(1) I was taking notes about the world's longest rivers ______ my teacher wrote the facts on the blackboard.
(2) We learned the word "deepest" ______ the teacher showed us a photo of the Mariana Trench.
4. 翻译句子（用 not...until...）：我昨晚直到做完这份地理之最的练习才去睡觉。
答案：1. Qomolangma is the highest mountain in the world.
2. (1) highest 前加 the，改为 the highest mountain；(2) read 改为 was reading（While 引导的从句常用过去进行时）。
3. (1) while；(2) when。
4. I didn't go to bed until I finished the exercise on the highest mountains in the world last night.
（参考表达：I didn't go to bed until I finished the practice about the superlatives of the world last night.）
解析：本题属于综合提高题，考查最高级的语义转换、when/while 辨析、过去进行时与 not...until... 结构。
1. 「比世界上任何其他山都高」即「世界上最高」，用 the highest 表达世界之最。易错点：误写成 Qomolangma is more higher...，或漏掉 the。
2. (1) 最高级前必须加 the；(2) while 引导的从句强调持续性背景动作，应用过去进行时 was reading，主句用一般过去时或过去进行时均可，但从句时态是常考点。易错点：把 while 从句写成一般过去时 read。
3. (1) take notes 与 write on the blackboard 是两个同时持续的动作，用 while；(2) show a photo 是短暂性动作，用 when。易错点：看到「当……时候」一律填 while，忽略了短暂性动词应用 when 的规则。
4. not...until... 意为「直到……才……」，主句必须用否定形式 didn't go to bed，从句用一般过去时 finished。易错点：把 until 误用为 by the time，或写成 I went to bed until...（肯定句误用 until 表「直到……才」）。