单选题 {{B}}Directions:{{/B}} Read the following text. Choose the best
word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1.
In recent years a new farming
revolution has begun, one that involves the{{U}} (1) {{/U}}of life at a
fundamental level-the gene. The study of genetics has{{U}} (2) {{/U}}a
new industry called biotechnology. As the name suggests, it{{U}} (3)
{{/U}}biology and modern technology through such techniques as genetic
engineering. Some of the new biotech companies specialize in agriculture and are
working feverishly to{{U}} (4) {{/U}}seeds that give a high yield,
that{{U}} (5) {{/U}}disease, drought and frost, and that reduce the need
for{{U}} (6) {{/U}}chemicals. If such goals could be achieved, it would
be most{{U}} (7) {{/U}}. But some have raised concerns about genetically
engineered crops. In nature, genetic diversity is created within
certain{{U}} (8) {{/U}}. A rose can be crossed with a different kind of
rose, but a rose will never cross with a potato. Genetic engineering{{U}}
(9) {{/U}}usually involves taking genes from one species and inserting
them into another{{U}} (10) {{/U}}to transfer a desired characteristic.
This could mean, for example, selecting a gene which leads to the production of
a chemical with anti-freeze{{U}} (11) {{/U}}from an arctic fish, and
inserting it into a potato or strawberry to make it frost-resistant.{{U}}
(12) {{/U}}, then, biotechnology allows humans to{{U}} (13)
{{/U}}the genetic walls that separate species.Like the green revolution,{{U}}
(14) {{/U}}some call the gene revolution contributes to the problem of
genetic uniformity-some say even more{{U}} (15) {{/U}}geneticists can
employ techniques such as cloning and{{U}} (16) {{/U}}culture, processes
that produce perfectly{{U}} (17) {{/U}}copies. Concerns about the
erosion of biodiversity, therefore, remain. Genetically altered plants, however,
raise new{{U}} (18) {{/U}}, such as the effect they may have on us and
environment. ".We are flying blindly into a new{{U}} (19) {{/U}}of
agricultural biotechnology with high hopes, few constraints and little idea of
the potential{{U}} (20) {{/U}}," said science writer Jemery
Rifkin.
【答案解析】[解析] 考查短语辨析。get along with意为“与……相处”；give rise to意为“导致，产生”； come up with意为“赶上，提出”；live up to。意为“实现，做到”。要补充的词的宾语是anew industry，故选项B符合上下文的意思。
【正确答案】
C
【答案解析】[解析] 考查词义辨析。brood意为“孵出，沉思”；breed意为“抚养，教养”；blend意为“混合，掺杂”；blast意为“爆炸，毁灭”。根据后面的biology and modern technology可知选项C正确，blend常与and连用，构成“blend A and B”结构。
【答案解析】[解析] 考查短语辨析与上下文逻辑关系。After all意为“毕竟”；on the other hand意为“另一方面”in any case意为“无论如何”；as a result意为“结果”。上文中的句子说，一朵玫瑰可以同一朵不同种类的玫瑰杂交，但是一朵玫瑰永远不可能同一个土豆杂交；本句话说，基因工程通常涉及从一个物种提取基因并植入另一物种，这说明前后两句话的意思是相对应的，故选项B正确。
【正确答案】
C
【答案解析】[解析] 考查词语搭配。所填词与不定式符号t。搭配，所以选项A和B不正确。in an attempt to意为“力求，以图”；with regard to 意为“关于，至于”。根据后面的“to transfer a desired characteristic”，可知选项C是正确的。