新GRE填空习题小测之指示词重复

1. Longdale and Stern discovered that mitochondria and chloroplasts ________ a long, identifiable sequence of DNA; such a coincidence could be ________only by the transfer of DNA between the two systems.

A. manufacture ... accomplished

B. reveal ... repeated

C. exhibit ... determined

D. share ... explained

E. maintain ... contradicted

2. The proponents of recombinant DNA research have decided to ________ federal regulation of their work; they hope that by making this compromise they can forestall proposed state and local controls that might be even stiffer.

A. protest

B. institute

C. deny

D. encourage

E. disregard

3. Laws do not ensure social order since laws can always be ________, which makes them ________ unless the authorities have the will and the power to detect and punish wrongdoing.

A. contested ... provisional

B. circumvented ... antiquated

C. repealed ... vulnerable

D. violated ... ineffective

E. modified ... unstable

4. Social tensions among adult factions can be ____ by politics，but adolescents and children have no such ____ for resolving their conflict with the exclusive world of adults.

A. intensified ... attitude

B. complicated ... relief

C. frustrated ... justificaiion

D. adjusted ... mechanism

E. revealed ... opportunity

以上这些新版GRE考试句子填空的习题是针对解释型重复的逻辑关系。判断出句子的逻辑关系后，才能更为准确地选出答案。