单项选择题
A. cliffs B. dinosaurs C. fossils D. museums
A. to whether they could learn to speak without the help of adults B. to prove that Phrygian was the first language of mankind C. to see whether they would speak the Egyptian language D. to discover which language would come most naturally
A. speaking the same language doesn’t necessarily bring peace B. wars can destroy the relationship between two countries C. English doesn’t kill other languages D. English is widely used in the world