1. How beautifully she sings! I have never heard _____ voice.
A. a better B. a best
C. the better D. the best
【陷阱】容易誤選D，認為最高級前要用定冠詞。
【分析】其實此題最佳答案為A，該句可視為...I have never heard a better voice than her voice 之省略，全句句意為"她唱得多好啊！我從未聽過她這么好的聲音"。請再看以下類似的實例：
He is fine, never better. 他很好，比以往任何時候都好。
This bird is really lovely. I've never seen a finer one. 這只鳥真可愛，我從未見過這樣好看的鳥。
比較以下試題，情形也大致相同：
(1) "I've never found a better job." "_______."
A. I don't think so B. Too bad
C. Congratulations D. Don't worry
答案選C，I've never found a better job可視為 I've never found a better job than this job 之省略，句意為：我從來沒有找到比這份工作更好的工作，即這是我所找到的最好的工作。
(2) "What do you think of the service here?" "Oh, ______. We couldn't have found a better place."
A. too bad B. sorry
C. wonderful D. impossible
答案選 C。We couldn't have found a better place 可視為We couldn't have found a better place than this place，其意為"我們不可能找到一個比這個地方更好的地方"，即"這是我們所能找到的最好的地方"。
(3) Boris has brains. In fact, I doubt whether anyone in the class has _____ IQ.
A. a high B. a higher
C. the higher D. the highest
答案選B，句意為"……我懷疑班上有沒有哪個人比他智商更高"，即"我認為他可能是班上智商最高的"。
(4) . How cold it is! We've never had ______ this winter.
A. the colder day B. a cold day
C. the coldest day D. a colder day
答案選D。句意為"今年冬天我們還從未遇上過這樣冷的日子"。

2. Professor White has written some short stories, but he is _____ known for his plays.
A. the best B. more
C. better D. the most
【陷阱】容易誤選D。
【分析】此題首先不宜選B或D，因為 well known 的比較級和最高級通常是 better known和best known，有時也可以是 more well known 和 most well known，但通常不能是 more known 和 most known。至于是選A還是C，這就要看語境。由于句中涉及的只有 stories 和 plays 兩個對象，故應選比較級。

3. You are _____ careful than your brother. You two can't do the work that needs care and skill.
A. not more B. no more
C. not less D. no less
【陷阱】容易誤選A。
【分析】要做對此題，首先要正確理解以下結構的含義：
not more ... than = 不如……
no more ... than = 和……一樣不 (否定兩者)
not less ... than = 不如……不 (即指不如 less 后形容詞的反面)
no less ... than = 和……一樣 (肯定兩者)
比較以下各句的意思：
You are more careful than he is. 你比他仔細。
You are not more careful than he is. 你不如他仔細。
You are no more careful than he is. 你和他一樣不仔細。
You are less careful than he is. 你不如他仔細（你比他粗心）。
You are not less careful than he is. 你比他仔細（你不如他粗心）。
You are no less careful than he is. 你和他一樣仔細。
通過以上分析，再結合句子語境，可知此題最佳答案為B。

4. "Oh, how fat he is!" "But I think he is ____ than fat."
A. short B. shorter
C. more short D. shortest
【陷阱】容易誤選B。認為 short為單音節(jié)形容詞，故用-er構成比較級。
【分析】其實正確答案應是C。要弄清此問題，得先從比較句型的兩種不同類型說起：
(1) 異類同質比較：即指兩個不同的人或事物(異類)在同一方面(同質)進行比較。如：
My room is smaller than yours. 我的房間比你的小。
Our country is more powerful than theirs. 我們的國家比他們的國家更強大。
(2) 同類異質比較：即指同一個人或事物(同類)在兩個不同的方面(異質)進行比較，這類句子常譯為"(更多的)是……，而不是"、"與其……不如……"等。如：
He was more lucky than clever.他是靠運氣而不是靠聰明。
She was more surprised than angry. 她感到更多的是驚訝而不是生氣。
This is more a war movie than a western. 這更應當說是一部戰(zhàn)爭片，而不是西部片。
按英語習慣，在進行同類異質比較時，只能用more構成比較級，不能用-er形式，即使是單音節(jié)詞也是如此。