. The flexibility of film allows the artist __________ unbridled imagination to the animation of cartoon characters.
(A) to bring
(B) bringing
(C) is brought
(D) brings
答案：A
测试点：不定式。
分析：allow+sb.十不定式为固定结构。4个答案中只有(A)to bring是不定式。
2. Traditionally, __________in New England on Thanksgiving Day.
(A) when served is sweet cider
(B) when sweet cider is served
(C) is served sweet cider
(D) sweet cider is served
答案：D
测试点：主谓结构。
分析：原句主、谓俱缺，应选一完整的主语+谓语的结构，即(D)。(A)、(C)不通，(B)则是从句，不适合此句。
3. Typical of the grassland dwellers of the continent __________, or pronghorn.
(A) it is the American antelope
(B) the American antelope is
(C) is the American antelope
(D) the American antelope
答案：C
测试点：倒装句。
分析：Typical of放在句首的句子，要用倒装句。Typical of…短语是表语，应在答案中选择“系动词+主语”的结构，即(C)。
解题要点：遇倒装句在4个答案中寻找以系动词 (be)开始的结构。
4. Lillian D. Wald, public health nurse and __________, was born in Cincinnati Ohio, in 1867.
(A) reforming society
(B) social reformer
(C) who reformed society
(D) her social reform
答案：B
测试点：并列结构。
分析：本句and前后都应是说明身份的名词性成份，故应选 (B) social reformer与nurse并列。(A)为动词性的分词词组;(C)是从句;(D)虽是名词性的，但不说明身份。
5. Copper sulfate, spread in judicious amounts, kills algae __________ harming fish or aquatic invert-ebrates.
(A) does not
(B) but does no
(C) except
(D) without
答案：D
测试点：介词。
分析：空格后的harming是动名词，前面应加介词，故选(D)。(A)是谓语动词的否定式，而farming不是谓语动词：(B)可以说does no harm (to)，但不能说does no harming;(C)虽为介词，但意思不对。
