The rapid expand of urban areas has reduced the amount of agricultural land available., A. rapid expand, B. urban areas, C. has reduced, D. agricultural land, The invention of the new device were announced at an international conference., A. invention, B. new device, C. were announced, D. international conference, Scientists carefully examined the formation of the rocks and its surrounding layers., A. carefully examined, B. formation, C. the rocks, D. its surrounding layers, The construct of the new research facility required nearly five years., A. construct, B. research facility, C. required, D. nearly five years, The committee's decide was based on evidence collected during the investigation., A. committee's decide, B. was based, C. collected, D. investigation, The introduction of new technologies have changed the way many industries operate., A. introduction, B. new technologies, C. have changed, D. industries operate, The professor gave a detailed explain of the process during the lecture., A. gave, B. detailed explain, C. the process, D. during the lecture, The preservation of historical documents require carefully controlled environmental conditions., A. preservation, B. historical documents, C. require, D. environmental conditions, The erupt of the volcano produced a cloud of ash that covered the surrounding region., A. erupt, B. volcano, C. produced, D. surrounding region, The translation of ancient texts provide historians with valuable information about earlier civilizations., A. translation, B. ancient texts, C. provide, D. earlier civilizations, The government announced the implement of several new environmental regulations., A. government, B. announced, C. implement, D. environmental regulations, The destruction of tropical forests have affected numerous plant and animal species., A. destruction, B. tropical forests, C. have affected, D. numerous species, The combination of these two chemicals produce a considerable amount of heat., A. combination, B. these two chemicals, C. produce, D. amount of heat, The scientist received international recognition for her discover of a previously unknown species., A. received, B. international recognition, C. discover, D. unknown species, The application of this technique have produced promising results in several experiments., A. application, B. this technique, C. have produced, D. several experiments, The completion of the project were delayed by severe weather conditions., A. completion, B. the project, C. were delayed, D. weather conditions, The modernization of the transportation system have improved access to remote communities., A. modernization, B. transportation system, C. have improved, D. remote communities, The researchers proposed several possible resolve to the environmental problem., A. researchers, B. proposed, C. possible resolve, D. environmental problem, The introduction of the new agricultural method were followed by a significant increase in production., A. introduction, B. agricultural method, C. were followed, D. increase in production, Careful examine of the fossil revealed characteristics not found in related species., A. Careful examine, B. fossil, C. revealed, D. related species

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